231302002031 has 2 divisors, whose sum is σ = 231302002032. Its totient is φ = 231302002030.

The previous prime is 231302002027. The next prime is 231302002033. The reversal of 231302002031 is 130200203132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231302002031 - 2² = 231302002027 is a prime.

It is a super-2 number, since 2×231302002031² (a number of 24 digits) contains 22 as substring.

Together with 231302002033, 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 (231302002033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115651001015 + 115651001016.

It is an arithmetic number, because the mean of its divisors is an integer number (115651001016).

Almost surely, 2^231302002031 is an apocalyptic number.

231302002031 is a deficient number, since it is larger than the sum of its proper divisors (1).

231302002031 is an equidigital number, since it uses as much as digits as its factorization.

231302002031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 231302002031 its reverse (130200203132), we get a palindrome (361502205163).

The spelling of 231302002031 in words is "two hundred thirty-one billion, three hundred two million, two thousand, thirty-one".