231251131 has 4 divisors (see below), whose sum is σ = 241305552. Its totient is φ = 221196712.

The previous prime is 231251117. The next prime is 231251143. The reversal of 231251131 is 131152132.

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

It is a cyclic number.

It is not a de Polignac number, because 231251131 - 2⁵ = 231251099 is a prime.

It is a super-2 number, since 2×231251131² = 106954171177558322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231251099 and 231251108.

It is not an unprimeable number, because it can be changed into a prime (231251161) 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, 5027176 + ... + 5027221.

It is an arithmetic number, because the mean of its divisors is an integer number (60326388).

Almost surely, 2^231251131 is an apocalyptic number.

231251131 is a deficient number, since it is larger than the sum of its proper divisors (10054421).

231251131 is a wasteful number, since it uses less digits than its factorization.

231251131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10054420.

The product of its digits is 180, while the sum is 19.

The square root of 231251131 is about 15206.9435127510. The cubic root of 231251131 is about 613.8015137552.

The spelling of 231251131 in words is "two hundred thirty-one million, two hundred fifty-one thousand, one hundred thirty-one".