231171051881 has 72 divisors (see below), whose sum is σ = 299121758208. Its totient is φ = 177989011200.

The previous prime is 231171051871. The next prime is 231171051887. The reversal of 231171051881 is 188150171132.

It is not a de Polignac number, because 231171051881 - 2¹⁴ = 231171035497 is a prime.

It is a super-2 number, since 2×231171051881² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231171051887) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 253754816 + ... + 253755726.

It is an arithmetic number, because the mean of its divisors is an integer number (4154468864).

Almost surely, 2^231171051881 is an apocalyptic number.

It is an amenable number.

231171051881 is a deficient number, since it is larger than the sum of its proper divisors (67950706327).

231171051881 is a wasteful number, since it uses less digits than its factorization.

231171051881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411 (or 1393 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 38.

The spelling of 231171051881 in words is "two hundred thirty-one billion, one hundred seventy-one million, fifty-one thousand, eight hundred eighty-one".