531644231 has 4 divisors (see below), whose sum is σ = 546013032. Its totient is φ = 517275432.

The previous prime is 531644207. The next prime is 531644249. The reversal of 531644231 is 132446135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132446135 = 5 ⋅26489227.

It is a cyclic number.

It is not a de Polignac number, because 531644231 - 2²² = 527449927 is a prime.

It is a super-2 number, since 2×531644231² = 565291176711162722, 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 = 531644194 and 531644203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531644261) 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, 7184345 + ... + 7184418.

It is an arithmetic number, because the mean of its divisors is an integer number (136503258).

Almost surely, 2^531644231 is an apocalyptic number.

531644231 is a deficient number, since it is larger than the sum of its proper divisors (14368801).

531644231 is a wasteful number, since it uses less digits than its factorization.

531644231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14368800.

The product of its digits is 8640, while the sum is 29.

The square root of 531644231 is about 23057.4116283680. The cubic root of 531644231 is about 810.1032388860.

The spelling of 531644231 in words is "five hundred thirty-one million, six hundred forty-four thousand, two hundred thirty-one".