205012530 has 24 divisors (see below), whose sum is σ = 533032812. Its totient is φ = 54669984.

The previous prime is 205012487. The next prime is 205012567. The reversal of 205012530 is 35210502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 188046369 + 16966161 = 13713^2 + 4119^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1138869 + ... + 1139048.

Almost surely, 2^205012530 is an apocalyptic number.

205012530 is an abundant number, since it is smaller than the sum of its proper divisors (328020282).

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

205012530 is a wasteful number, since it uses less digits than its factorization.

205012530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277930 (or 2277927 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 205012530 is about 14318.2586231706. The cubic root of 205012530 is about 589.6488670040.

The spelling of 205012530 in words is "two hundred five million, twelve thousand, five hundred thirty".