232115521 has 4 divisors (see below), whose sum is σ = 253216944. Its totient is φ = 211014100.

The previous prime is 232115519. The next prime is 232115531. The reversal of 232115521 is 125511232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 232115521 - 2¹ = 232115519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 232115492 and 232115501.

It is not an unprimeable number, because it can be changed into a prime (232115531) 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, 10550695 + ... + 10550716.

It is an arithmetic number, because the mean of its divisors is an integer number (63304236).

Almost surely, 2^232115521 is an apocalyptic number.

It is an amenable number.

232115521 is a deficient number, since it is larger than the sum of its proper divisors (21101423).

232115521 is a wasteful number, since it uses less digits than its factorization.

232115521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21101422.

The product of its digits is 600, while the sum is 22.

The square root of 232115521 is about 15235.3379023900. The cubic root of 232115521 is about 614.5653358900.

Adding to 232115521 its reverse (125511232), we get a palindrome (357626753).

The spelling of 232115521 in words is "two hundred thirty-two million, one hundred fifteen thousand, five hundred twenty-one".