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220500000 = 25325672
BaseRepresentation
bin11010010010010…
…01000000100000
3120100220120010200
431021021000200
5422422000000
633514025200
75315135100
oct1511110040
9510816120
10220500000
11103514a06
1261a18200
13368b4196
14213db200
1514558500
hexd249020

220500000 has 378 divisors, whose sum is σ = 911765673. Its totient is φ = 50400000.

The previous prime is 220499977. The next prime is 220500019. The reversal of 220500000 is 5022.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 4 ways, for example, as 37601424 + 182898576 = 6132^2 + 13524^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=10500.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 31499997 + ... + 31500003.

Almost surely, 2220500000 is an apocalyptic number.

220500000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220500000

220500000 is an abundant number, since it is smaller than the sum of its proper divisors (691265673).

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

220500000 is an frugal number, since it uses more digits than its factorization.

220500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 220500000 is about 14849.2424049175. The cubic root of 220500000 is about 604.1380617980.

Adding to 220500000 its reverse (5022), we get a palindrome (220505022).

The spelling of 220500000 in words is "two hundred twenty million, five hundred thousand".