261931204 has 12 divisors (see below), whose sum is σ = 458654224. Its totient is φ = 130887144.

The previous prime is 261931181. The next prime is 261931211. The reversal of 261931204 is 402139162.

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 3 ways as a sum of consecutive naturals, for example, 11754 + ... + 25729.

Almost surely, 2^261931204 is an apocalyptic number.

It is an amenable number.

261931204 is a deficient number, since it is larger than the sum of its proper divisors (196723020).

261931204 is a wasteful number, since it uses less digits than its factorization.

261931204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39234 (or 39232 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 261931204 is about 16184.2888011800. The cubic root of 261931204 is about 639.8267792926.

The spelling of 261931204 in words is "two hundred sixty-one million, nine hundred thirty-one thousand, two hundred four".