15316023131 has 2 divisors, whose sum is σ = 15316023132. Its totient is φ = 15316023130.

The previous prime is 15316023043. The next prime is 15316023137. The reversal of 15316023131 is 13132061351.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15316023131 is a prime.

It is a super-2 number, since 2×15316023131² (a number of 21 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 15316023131.

It is not a weakly prime, because it can be changed into another prime (15316023137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7658011565 + 7658011566.

It is an arithmetic number, because the mean of its divisors is an integer number (7658011566).

Almost surely, 2^15316023131 is an apocalyptic number.

15316023131 is a deficient number, since it is larger than the sum of its proper divisors (1).

15316023131 is an equidigital number, since it uses as much as digits as its factorization.

15316023131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

Adding to 15316023131 its reverse (13132061351), we get a palindrome (28448084482).

The spelling of 15316023131 in words is "fifteen billion, three hundred sixteen million, twenty-three thousand, one hundred thirty-one".