31400263031 has 2 divisors, whose sum is σ = 31400263032. Its totient is φ = 31400263030.

The previous prime is 31400263007. The next prime is 31400263051. The reversal of 31400263031 is 13036200413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31400263031 - 2²² = 31396068727 is a prime.

It is a super-2 number, since 2×31400263031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31400262988 and 31400263006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31400263051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700131515 + 15700131516.

It is an arithmetic number, because the mean of its divisors is an integer number (15700131516).

Almost surely, 2^31400263031 is an apocalyptic number.

31400263031 is a deficient number, since it is larger than the sum of its proper divisors (1).

31400263031 is an equidigital number, since it uses as much as digits as its factorization.

31400263031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31400263031 its reverse (13036200413), we get a palindrome (44436463444).

The spelling of 31400263031 in words is "thirty-one billion, four hundred million, two hundred sixty-three thousand, thirty-one".