231244031 has 4 divisors (see below), whose sum is σ = 231274632. Its totient is φ = 231213432.

The previous prime is 231244009. The next prime is 231244033. The reversal of 231244031 is 130442132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 231244031 - 2²² = 227049727 is a prime.

It is a super-2 number, since 2×231244031² = 106947603746257922, 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 = 231243994 and 231244012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231244033) 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, 5120 + ... + 22106.

It is an arithmetic number, because the mean of its divisors is an integer number (57818658).

Almost surely, 2^231244031 is an apocalyptic number.

231244031 is a deficient number, since it is larger than the sum of its proper divisors (30601).

231244031 is a wasteful number, since it uses less digits than its factorization.

231244031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30600.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 231244031 is about 15206.7100649680. The cubic root of 231244031 is about 613.7952319331.

Adding to 231244031 its reverse (130442132), we get a palindrome (361686163).

The spelling of 231244031 in words is "two hundred thirty-one million, two hundred forty-four thousand, thirty-one".