231433013 has 4 divisors (see below), whose sum is σ = 264494880. Its totient is φ = 198371148.

The previous prime is 231433003. The next prime is 231433031. The reversal of 231433013 is 310334132.

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 a cyclic number.

It is not a de Polignac number, because 231433013 - 2⁸ = 231432757 is a prime.

It is a super-2 number, since 2×231433013² = 107122479012516338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231433003) 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, 16530923 + ... + 16530936.

It is an arithmetic number, because the mean of its divisors is an integer number (66123720).

Almost surely, 2^231433013 is an apocalyptic number.

It is an amenable number.

231433013 is a deficient number, since it is larger than the sum of its proper divisors (33061867).

231433013 is an equidigital number, since it uses as much as digits as its factorization.

231433013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33061866.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 231433013 is about 15212.9225660292. The cubic root of 231433013 is about 613.9623925231.

Adding to 231433013 its reverse (310334132), we get a palindrome (541767145).

The spelling of 231433013 in words is "two hundred thirty-one million, four hundred thirty-three thousand, thirteen".