205505152 has 16 divisors (see below), whose sum is σ = 409405050. Its totient is φ = 102752512.

The previous prime is 205505137. The next prime is 205505171. The reversal of 205505152 is 251505502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 155151936 + 50353216 = 12456^2 + 7096^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802627 + ... + 802882.

Almost surely, 2^205505152 is an apocalyptic number.

It is an amenable number.

205505152 is a deficient number, since it is larger than the sum of its proper divisors (203899898).

205505152 is an equidigital number, since it uses as much as digits as its factorization.

205505152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605523 (or 1605511 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 205505152 is about 14335.4508823406. The cubic root of 205505152 is about 590.1207758112.

The spelling of 205505152 in words is "two hundred five million, five hundred five thousand, one hundred fifty-two".