232131309 has 8 divisors (see below), whose sum is σ = 313426560. Its totient is φ = 152795136.

The previous prime is 232131247. The next prime is 232131323. The reversal of 232131309 is 903131232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 232131309 - 2²⁵ = 198576877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232131509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489492 + ... + 489965.

It is an arithmetic number, because the mean of its divisors is an integer number (39178320).

Almost surely, 2^232131309 is an apocalyptic number.

It is an amenable number.

232131309 is a deficient number, since it is larger than the sum of its proper divisors (81295251).

232131309 is an equidigital number, since it uses as much as digits as its factorization.

232131309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979539.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 232131309 is about 15235.8560310867. The cubic root of 232131309 is about 614.5792693795.

The spelling of 232131309 in words is "two hundred thirty-two million, one hundred thirty-one thousand, three hundred nine".