231532664 has 16 divisors (see below), whose sum is σ = 473589720. Its totient is φ = 105242080.

The previous prime is 231532661. The next prime is 231532667. The reversal of 231532664 is 466235132.

It is an interprime number because it is at equal distance from previous prime (231532661) and next prime (231532667).

It is a self number, because there is not a number n which added to its sum of digits gives 231532664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231532661) 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, 1315439 + ... + 1315614.

Almost surely, 2^231532664 is an apocalyptic number.

It is an amenable number.

231532664 is an abundant number, since it is smaller than the sum of its proper divisors (242057056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231532664 is a wasteful number, since it uses less digits than its factorization.

231532664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631070 (or 2631066 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 231532664 is about 15216.1974224837. The cubic root of 231532664 is about 614.0505003610.

Adding to 231532664 its reverse (466235132), we get a palindrome (697767796).

The spelling of 231532664 in words is "two hundred thirty-one million, five hundred thirty-two thousand, six hundred sixty-four".