231551131 has 8 divisors (see below), whose sum is σ = 264802304. Its totient is φ = 198343080.

The previous prime is 231551063. The next prime is 231551141. The reversal of 231551131 is 131155132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231551131 - 2¹¹ = 231549083 is a prime.

It is a super-2 number, since 2×231551131² = 107231852534758322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231551141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1696 + ... + 21586.

It is an arithmetic number, because the mean of its divisors is an integer number (33100288).

Almost surely, 2^231551131 is an apocalyptic number.

231551131 is a deficient number, since it is larger than the sum of its proper divisors (33251173).

231551131 is a wasteful number, since it uses less digits than its factorization.

231551131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21561.

The product of its digits is 450, while the sum is 22.

The square root of 231551131 is about 15216.8042308495. The cubic root of 231551131 is about 614.0668254429.

The spelling of 231551131 in words is "two hundred thirty-one million, five hundred fifty-one thousand, one hundred thirty-one".