231904313 has 2 divisors, whose sum is σ = 231904314. Its totient is φ = 231904312.

The previous prime is 231904297. The next prime is 231904333. The reversal of 231904313 is 313409132.

It is a happy number.

231904313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156075049 + 75829264 = 12493^2 + 8708^2 .

It is a cyclic number.

It is not a de Polignac number, because 231904313 - 2⁴ = 231904297 is a prime.

It is a super-2 number, since 2×231904313² = 107559220776003938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231904333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115952156 + 115952157.

It is an arithmetic number, because the mean of its divisors is an integer number (115952157).

Almost surely, 2^231904313 is an apocalyptic number.

It is an amenable number.

231904313 is a deficient number, since it is larger than the sum of its proper divisors (1).

231904313 is an equidigital number, since it uses as much as digits as its factorization.

231904313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 231904313 is about 15228.4048081209. The cubic root of 231904313 is about 614.3788762848.

The spelling of 231904313 in words is "two hundred thirty-one million, nine hundred four thousand, three hundred thirteen".