232131021 has 16 divisors (see below), whose sum is σ = 318188160. Its totient is φ = 150474240.

The previous prime is 232131013. The next prime is 232131023. The reversal of 232131021 is 120131232.

It is not a de Polignac number, because 232131021 - 2³ = 232131013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232131023) 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, 8085 + ... + 23013.

It is an arithmetic number, because the mean of its divisors is an integer number (19886760).

Almost surely, 2^232131021 is an apocalyptic number.

It is an amenable number.

232131021 is a deficient number, since it is larger than the sum of its proper divisors (86057139).

232131021 is a wasteful number, since it uses less digits than its factorization.

232131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15076.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 232131021 is about 15235.8465796949. The cubic root of 232131021 is about 614.5790152146.

Adding to 232131021 its reverse (120131232), we get a palindrome (352262253).

The spelling of 232131021 in words is "two hundred thirty-two million, one hundred thirty-one thousand, twenty-one".