231075613 has 2 divisors, whose sum is σ = 231075614. Its totient is φ = 231075612.

The previous prime is 231075589. The next prime is 231075617. The reversal of 231075613 is 316570132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229734649 + 1340964 = 15157^2 + 1158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231075613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231075617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115537806 + 115537807.

It is an arithmetic number, because the mean of its divisors is an integer number (115537807).

Almost surely, 2^231075613 is an apocalyptic number.

It is an amenable number.

231075613 is a deficient number, since it is larger than the sum of its proper divisors (1).

231075613 is an equidigital number, since it uses as much as digits as its factorization.

231075613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 231075613 is about 15201.1714351230. The cubic root of 231075613 is about 613.6461840906.

The spelling of 231075613 in words is "two hundred thirty-one million, seventy-five thousand, six hundred thirteen".