531232031 has 16 divisors (see below), whose sum is σ = 614586528. Its totient is φ = 453811200.

The previous prime is 531232021. The next prime is 531232033. The reversal of 531232031 is 130232135.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531232031 is a prime.

It is a super-2 number, since 2×531232031² = 564414941520769922, 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 = 531231994 and 531232012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531232033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140441 + ... + 144173.

It is an arithmetic number, because the mean of its divisors is an integer number (38411658).

Almost surely, 2^531232031 is an apocalyptic number.

531232031 is a deficient number, since it is larger than the sum of its proper divisors (83354497).

531232031 is a wasteful number, since it uses less digits than its factorization.

531232031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 531232031 is about 23048.4713375963. The cubic root of 531232031 is about 809.8938188306.

Adding to 531232031 its reverse (130232135), we get a palindrome (661464166).

The spelling of 531232031 in words is "five hundred thirty-one million, two hundred thirty-two thousand, thirty-one".