231044331 has 32 divisors (see below), whose sum is σ = 379842048. Its totient is φ = 121904640.

The previous prime is 231044327. The next prime is 231044377. The reversal of 231044331 is 133440132.

It is not a de Polignac number, because 231044331 - 2² = 231044327 is a prime.

It is a super-2 number, since 2×231044331² = 106762965774475122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 231044298 and 231044307.

It is not an unprimeable number, because it can be changed into a prime (231044311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12816 + ... + 25026.

It is an arithmetic number, because the mean of its divisors is an integer number (11870064).

Almost surely, 2^231044331 is an apocalyptic number.

231044331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231044331 is a deficient number, since it is larger than the sum of its proper divisors (148797717).

231044331 is a wasteful number, since it uses less digits than its factorization.

231044331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12291.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231044331 is about 15200.1424664376. The cubic root of 231044331 is about 613.6184919339.

Adding to 231044331 its reverse (133440132), we get a palindrome (364484463).

The spelling of 231044331 in words is "two hundred thirty-one million, forty-four thousand, three hundred thirty-one".