263531172 has 12 divisors (see below), whose sum is σ = 614906096. Its totient is φ = 87843720.

The previous prime is 263531143. The next prime is 263531173. The reversal of 263531172 is 271135362.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (263531173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10980454 + ... + 10980477.

Almost surely, 2^263531172 is an apocalyptic number.

It is an amenable number.

263531172 is an abundant number, since it is smaller than the sum of its proper divisors (351374924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263531172 is a wasteful number, since it uses less digits than its factorization.

263531172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21960938 (or 21960936 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 263531172 is about 16233.6432140170. The cubic root of 263531172 is about 641.1268980813.

The spelling of 263531172 in words is "two hundred sixty-three million, five hundred thirty-one thousand, one hundred seventy-two".