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202031220 = 22355715897
BaseRepresentation
bin11000000101011…
…00000001110100
3112002011020201210
430002230001310
5403204444340
632014121420
75002144206
oct1402540164
9462136653
10202031220
11a4050056
12577b0270
1332b18a01
141cb90776
1512b0b180
hexc0ac074

202031220 has 48 divisors (see below), whose sum is σ = 566774208. Its totient is φ = 53771520.

The previous prime is 202031201. The next prime is 202031227. The reversal of 202031220 is 22130202.

It is a super-2 number, since 2×2020312202 = 81633227709376800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 202031196 and 202031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202031227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31312 + ... + 37208.

It is an arithmetic number, because the mean of its divisors is an integer number (11807796).

Almost surely, 2202031220 is an apocalyptic number.

202031220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202031220 is an abundant number, since it is smaller than the sum of its proper divisors (364742988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202031220 is a wasteful number, since it uses less digits than its factorization.

202031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480 (or 6478 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 202031220 is about 14213.7686768851. The cubic root of 202031220 is about 586.7766573788.

Adding to 202031220 its reverse (22130202), we get a palindrome (224161422).

The spelling of 202031220 in words is "two hundred two million, thirty-one thousand, two hundred twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 571 1142 1713 2284 2855 3426 5710 5897 6852 8565 11420 11794 17130 17691 23588 29485 34260 35382 58970 70764 88455 117940 176910 353820 3367187 6734374 10101561 13468748 16835935 20203122 33671870 40406244 50507805 67343740 101015610 202031220