232013521 has 8 divisors (see below), whose sum is σ = 234670824. Its totient is φ = 229367040.

The previous prime is 232013513. The next prime is 232013527. The reversal of 232013521 is 125310232.

It can be written as a sum of positive squares in 4 ways, for example, as 36433296 + 195580225 = 6036^2 + 13985^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 232013521 - 2³ = 232013513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232013527) 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, 45135 + ... + 50011.

It is an arithmetic number, because the mean of its divisors is an integer number (29333853).

Almost surely, 2^232013521 is an apocalyptic number.

It is an amenable number.

232013521 is a deficient number, since it is larger than the sum of its proper divisors (2657303).

232013521 is a wasteful number, since it uses less digits than its factorization.

232013521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 232013521 is about 15231.9900538308. The cubic root of 232013521 is about 614.4753019156.

Adding to 232013521 its reverse (125310232), we get a palindrome (357323753).

The spelling of 232013521 in words is "two hundred thirty-two million, thirteen thousand, five hundred twenty-one".