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61520202 = 2331139263
BaseRepresentation
bin1110101010101…
…1100101001010
311021202112212000
43222223211022
5111222121302
610034331430
71344625122
oct352534512
9137675760
1061520202
11317aa047
1218729b76
13c98cbb3
148255c82
15560331c
hex3aab94a

61520202 has 16 divisors (see below), whose sum is σ = 136711680. Its totient is φ = 20506716.

The previous prime is 61520191. The next prime is 61520203. The reversal of 61520202 is 20202516.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (61520203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569578 + ... + 569685.

It is an arithmetic number, because the mean of its divisors is an integer number (8544480).

Almost surely, 261520202 is an apocalyptic number.

61520202 is an abundant number, since it is smaller than the sum of its proper divisors (75191478).

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

61520202 is a wasteful number, since it uses less digits than its factorization.

61520202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139274 (or 1139268 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 61520202 is about 7843.4814973964. The cubic root of 61520202 is about 394.7655544083.

Adding to 61520202 its reverse (20202516), we get a palindrome (81722718).

The spelling of 61520202 in words is "sixty-one million, five hundred twenty thousand, two hundred two".

Divisors: 1 2 3 6 9 18 27 54 1139263 2278526 3417789 6835578 10253367 20506734 30760101 61520202