231050631 has 20 divisors (see below), whose sum is σ = 359401912. Its totient is φ = 132024816.

The previous prime is 231050629. The next prime is 231050641. The reversal of 231050631 is 136050132.

It is not a de Polignac number, because 231050631 - 2¹ = 231050629 is a prime.

It is a super-2 number, since 2×231050631² = 106768788170996322, which contains 22 as substring.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231050598 and 231050607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231050641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8836 + ... + 23241.

Almost surely, 2^231050631 is an apocalyptic number.

231050631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231050631 is a deficient number, since it is larger than the sum of its proper divisors (128351281).

231050631 is an frugal number, since it uses more digits than its factorization.

231050631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32108 (or 32087 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 231050631 is about 15200.3496999247. The cubic root of 231050631 is about 613.6240691628.

The spelling of 231050631 in words is "two hundred thirty-one million, fifty thousand, six hundred thirty-one".