232012521 has 12 divisors (see below), whose sum is σ = 360908548. Its totient is φ = 142776864.

The previous prime is 232012511. The next prime is 232012537. The reversal of 232012521 is 125210232.

It can be written as a sum of positive squares in 2 ways, for example, as 151659225 + 80353296 = 12315^2 + 8964^2 .

It is not a de Polignac number, because 232012521 - 2⁵ = 232012489 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 232012494 and 232012503.

It is not an unprimeable number, because it can be changed into a prime (232012511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 991390 + ... + 991623.

Almost surely, 2^232012521 is an apocalyptic number.

It is an amenable number.

232012521 is a deficient number, since it is larger than the sum of its proper divisors (128896027).

232012521 is a wasteful number, since it uses less digits than its factorization.

232012521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983032 (or 1983029 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 232012521 is about 15231.9572281437. The cubic root of 232012521 is about 614.4744190989.

Adding to 232012521 its reverse (125210232), we get a palindrome (357222753).

It can be divided in two parts, 2320 and 12521, that added together give a palindrome (14841).

The spelling of 232012521 in words is "two hundred thirty-two million, twelve thousand, five hundred twenty-one".