261433156 has 12 divisors (see below), whose sum is σ = 460248768. Its totient is φ = 129933512.

The previous prime is 261433093. The next prime is 261433169. The reversal of 261433156 is 651334162.

261433156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×261433156² = 136694590112240672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195016 + ... + 196351.

It is an arithmetic number, because the mean of its divisors is an integer number (38354064).

Almost surely, 2^261433156 is an apocalyptic number.

It is an amenable number.

261433156 is a deficient number, since it is larger than the sum of its proper divisors (198815612).

261433156 is a wasteful number, since it uses less digits than its factorization.

261433156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391538 (or 391536 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 261433156 is about 16168.8947055759. The cubic root of 261433156 is about 639.4209899977.

The spelling of 261433156 in words is "two hundred sixty-one million, four hundred thirty-three thousand, one hundred fifty-six".