231233013 has 48 divisors (see below), whose sum is σ = 375777792. Its totient is φ = 135828000.

The previous prime is 231232949. The next prime is 231233027. The reversal of 231233013 is 310332132.

It is not a de Polignac number, because 231233013 - 2⁶ = 231232949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231233063) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 470698 + ... + 471188.

It is an arithmetic number, because the mean of its divisors is an integer number (7828704).

Almost surely, 2^231233013 is an apocalyptic number.

It is an amenable number.

231233013 is a deficient number, since it is larger than the sum of its proper divisors (144544779).

231233013 is a wasteful number, since it uses less digits than its factorization.

231233013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 231233013 is about 15206.3477863687. The cubic root of 231233013 is about 613.7854833525.

Adding to 231233013 its reverse (310332132), we get a palindrome (541565145).

The spelling of 231233013 in words is "two hundred thirty-one million, two hundred thirty-three thousand, thirteen".