231165332881 has 32 divisors (see below), whose sum is σ = 281816391168. Its totient is φ = 185340925440.

The previous prime is 231165332861. The next prime is 231165332887. The reversal of 231165332881 is 188233561132.

It is a cyclic number.

It is not a de Polignac number, because 231165332881 - 2¹¹ = 231165330833 is a prime.

It is a super-2 number, since 2×231165332881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231165332887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1631005 + ... + 1767061.

It is an arithmetic number, because the mean of its divisors is an integer number (8806762224).

Almost surely, 2^231165332881 is an apocalyptic number.

It is an amenable number.

231165332881 is a deficient number, since it is larger than the sum of its proper divisors (50651058287).

231165332881 is a wasteful number, since it uses less digits than its factorization.

231165332881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136321.

The product of its digits is 207360, while the sum is 43.

The spelling of 231165332881 in words is "two hundred thirty-one billion, one hundred sixty-five million, three hundred thirty-two thousand, eight hundred eighty-one".