231450531 has 32 divisors (see below), whose sum is σ = 339978240. Its totient is φ = 139190400.

The previous prime is 231450517. The next prime is 231450547. The reversal of 231450531 is 135054132.

It is not a de Polignac number, because 231450531 - 2²¹ = 229353379 is a prime.

It is a super-2 number, since 2×231450531² = 107138696600363922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231450511) 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, 644530 + ... + 644888.

It is an arithmetic number, because the mean of its divisors is an integer number (10624320).

Almost surely, 2^231450531 is an apocalyptic number.

231450531 is a deficient number, since it is larger than the sum of its proper divisors (108527709).

231450531 is a wasteful number, since it uses less digits than its factorization.

231450531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 231450531 is about 15213.4983156406. The cubic root of 231450531 is about 613.9778831420.

The spelling of 231450531 in words is "two hundred thirty-one million, four hundred fifty thousand, five hundred thirty-one".