205575172 has 24 divisors (see below), whose sum is σ = 394974720. Its totient is φ = 92844960.

The previous prime is 205575157. The next prime is 205575179. The reversal of 205575172 is 271575502.

It is a super-2 number, since 2×205575172² = 84522302685659168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205575179) 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, 7972 + ... + 21787.

It is an arithmetic number, because the mean of its divisors is an integer number (16457280).

Almost surely, 2^205575172 is an apocalyptic number.

205575172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

205575172 is a deficient number, since it is larger than the sum of its proper divisors (189399548).

205575172 is a wasteful number, since it uses less digits than its factorization.

205575172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29931 (or 29929 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 205575172 is about 14337.8928716879. The cubic root of 205575172 is about 590.1877904566.

The spelling of 205575172 in words is "two hundred five million, five hundred seventy-five thousand, one hundred seventy-two".