231301139 has 2 divisors, whose sum is σ = 231301140. Its totient is φ = 231301138.

The previous prime is 231301127. The next prime is 231301153. The reversal of 231301139 is 931103132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231301139 - 2⁴ = 231301123 is a prime.

It is a Chen prime.

It is equal to p_12710228 and since 231301139 and 12710228 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231301339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115650569 + 115650570.

It is an arithmetic number, because the mean of its divisors is an integer number (115650570).

Almost surely, 2^231301139 is an apocalyptic number.

231301139 is a deficient number, since it is larger than the sum of its proper divisors (1).

231301139 is an equidigital number, since it uses as much as digits as its factorization.

231301139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 231301139 is about 15208.5876727591. The cubic root of 231301139 is about 613.8457553749.

The spelling of 231301139 in words is "two hundred thirty-one million, three hundred one thousand, one hundred thirty-nine".