231150903881 has 4 divisors (see below), whose sum is σ = 244748015892. Its totient is φ = 217553791872.

The previous prime is 231150903833. The next prime is 231150903913. The reversal of 231150903881 is 188309051132.

231150903881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109849159225 + 121301744656 = 331435^2 + 348284^2 .

It is a cyclic number.

It is not a de Polignac number, because 231150903881 - 2²⁶ = 231083795017 is a prime.

It is a super-2 number, since 2×231150903881² (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 (231150906881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6798555980 + ... + 6798556013.

It is an arithmetic number, because the mean of its divisors is an integer number (61187003973).

Almost surely, 2^231150903881 is an apocalyptic number.

It is an amenable number.

231150903881 is a deficient number, since it is larger than the sum of its proper divisors (13597112011).

231150903881 is a wasteful number, since it uses less digits than its factorization.

231150903881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13597112010.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 231150903881 in words is "two hundred thirty-one billion, one hundred fifty million, nine hundred three thousand, eight hundred eighty-one".