31023209881031 has 2 divisors, whose sum is σ = 31023209881032. Its totient is φ = 31023209881030.

The previous prime is 31023209880997. The next prime is 31023209881063. The reversal of 31023209881031 is 13018890232013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31023209881031 - 2²² = 31023205686727 is a prime.

It is a super-2 number, since 2×31023209881031² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31023209881031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31023209881831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15511604940515 + 15511604940516.

It is an arithmetic number, because the mean of its divisors is an integer number (15511604940516).

Almost surely, 2^{31023209881031} is an apocalyptic number.

31023209881031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31023209881031 is an equidigital number, since it uses as much as digits as its factorization.

31023209881031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 31023209881031 in words is "thirty-one trillion, twenty-three billion, two hundred nine million, eight hundred eighty-one thousand, thirty-one".