31030103231 has 2 divisors, whose sum is σ = 31030103232. Its totient is φ = 31030103230.

The previous prime is 31030103219. The next prime is 31030103249. The reversal of 31030103231 is 13230103013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31030103231 - 2²⁶ = 30962994367 is a prime.

It is a super-2 number, since 2×31030103231² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31030123231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515051615 + 15515051616.

It is an arithmetic number, because the mean of its divisors is an integer number (15515051616).

Almost surely, 2^31030103231 is an apocalyptic number.

31030103231 is a deficient number, since it is larger than the sum of its proper divisors (1).

31030103231 is an equidigital number, since it uses as much as digits as its factorization.

31030103231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31030103231 its reverse (13230103013), we get a palindrome (44260206244).

The spelling of 31030103231 in words is "thirty-one billion, thirty million, one hundred three thousand, two hundred thirty-one".