15772256131 has 2 divisors, whose sum is σ = 15772256132. Its totient is φ = 15772256130.

The previous prime is 15772256063. The next prime is 15772256147. The reversal of 15772256131 is 13165227751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15772256131 - 2¹¹ = 15772254083 is a prime.

It is a super-2 number, since 2×15772256131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15772256161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7886128065 + 7886128066.

It is an arithmetic number, because the mean of its divisors is an integer number (7886128066).

Almost surely, 2^15772256131 is an apocalyptic number.

15772256131 is a deficient number, since it is larger than the sum of its proper divisors (1).

15772256131 is an equidigital number, since it uses as much as digits as its factorization.

15772256131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 40.

The spelling of 15772256131 in words is "fifteen billion, seven hundred seventy-two million, two hundred fifty-six thousand, one hundred thirty-one".