531626231 has 4 divisors (see below), whose sum is σ = 549958200. Its totient is φ = 513294264.

The previous prime is 531626149. The next prime is 531626239. The reversal of 531626231 is 132626135.

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 531626231 - 2¹⁴ = 531609847 is a prime.

It is a super-2 number, since 2×531626231² = 565252898974530722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 18331939 = 531626231 / (5 + 3 + 1 + 6 + 2 + 6 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531626194 and 531626203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531626239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9165941 + ... + 9165998.

It is an arithmetic number, because the mean of its divisors is an integer number (137489550).

Almost surely, 2^531626231 is an apocalyptic number.

531626231 is a deficient number, since it is larger than the sum of its proper divisors (18331969).

531626231 is a wasteful number, since it uses less digits than its factorization.

531626231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18331968.

The product of its digits is 6480, while the sum is 29.

The square root of 531626231 is about 23057.0212950416. The cubic root of 531626231 is about 810.0940961661.

The spelling of 531626231 in words is "five hundred thirty-one million, six hundred twenty-six thousand, two hundred thirty-one".