231013321 has 24 divisors (see below), whose sum is σ = 293025600. Its totient is φ = 178258080.

The previous prime is 231013309. The next prime is 231013327. The reversal of 231013321 is 123310132.

It is not a de Polignac number, because 231013321 - 2²³ = 222624713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231013295 and 231013304.

It is not an unprimeable number, because it can be changed into a prime (231013327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89355 + ... + 91903.

It is an arithmetic number, because the mean of its divisors is an integer number (12209400).

Almost surely, 2^231013321 is an apocalyptic number.

It is an amenable number.

231013321 is a deficient number, since it is larger than the sum of its proper divisors (62012279).

231013321 is a wasteful number, since it uses less digits than its factorization.

231013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685 (or 2674 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 231013321 is about 15199.1223759795. The cubic root of 231013321 is about 613.5910380961.

Adding to 231013321 its reverse (123310132), we get a palindrome (354323453).

The spelling of 231013321 in words is "two hundred thirty-one million, thirteen thousand, three hundred twenty-one".