31304441131 has 2 divisors, whose sum is σ = 31304441132. Its totient is φ = 31304441130.

The previous prime is 31304441117. The next prime is 31304441143. The reversal of 31304441131 is 13114440313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31304441131 - 2³³ = 22714506539 is a prime.

It is a super-2 number, since 2×31304441131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31304441096 and 31304441105.

It is not a weakly prime, because it can be changed into another prime (31304441101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15652220565 + 15652220566.

It is an arithmetic number, because the mean of its divisors is an integer number (15652220566).

Almost surely, 2^31304441131 is an apocalyptic number.

31304441131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31304441131 is an equidigital number, since it uses as much as digits as its factorization.

31304441131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31304441131 its reverse (13114440313), we get a palindrome (44418881444).

The spelling of 31304441131 in words is "thirty-one billion, three hundred four million, four hundred forty-one thousand, one hundred thirty-one".