231025031 has 2 divisors, whose sum is σ = 231025032. Its totient is φ = 231025030.

The previous prime is 231025021. The next prime is 231025033. The reversal of 231025031 is 130520132.

231025031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231025031 - 2⁶ = 231024967 is a prime.

It is a super-2 number, since 2×231025031² = 106745129897101922, which contains 22 as substring.

Together with 231025033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231025033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115512515 + 115512516.

It is an arithmetic number, because the mean of its divisors is an integer number (115512516).

Almost surely, 2^231025031 is an apocalyptic number.

231025031 is a deficient number, since it is larger than the sum of its proper divisors (1).

231025031 is an equidigital number, since it uses as much as digits as its factorization.

231025031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 231025031 is about 15199.5075907083. The cubic root of 231025031 is about 613.6014055064.

Adding to 231025031 its reverse (130520132), we get a palindrome (361545163).

The spelling of 231025031 in words is "two hundred thirty-one million, twenty-five thousand, thirty-one".