205556530 has 16 divisors (see below), whose sum is σ = 370486080. Its totient is φ = 82114992.

The previous prime is 205556509. The next prime is 205556551. The reversal of 205556530 is 35655502.

It is an interprime number because it is at equal distance from previous prime (205556509) and next prime (205556551).

It is a junction number, because it is equal to n+sod(n) for n = 205556492 and 205556501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5190 + ... + 20929.

It is an arithmetic number, because the mean of its divisors is an integer number (23155380).

Almost surely, 2^205556530 is an apocalyptic number.

205556530 is a deficient number, since it is larger than the sum of its proper divisors (164929550).

205556530 is a wasteful number, since it uses less digits than its factorization.

205556530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26913.

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 205556530 is about 14337.2427614238. The cubic root of 205556530 is about 590.1699500834.

It can be divided in two parts, 2055 and 56530, that added together give a palindrome (58585).

The spelling of 205556530 in words is "two hundred five million, five hundred fifty-six thousand, five hundred thirty".