8722815131 has 2 divisors, whose sum is σ = 8722815132. Its totient is φ = 8722815130.

The previous prime is 8722815103. The next prime is 8722815161. The reversal of 8722815131 is 1315182278.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8722815131 is a prime.

It is a super-2 number, since 2×8722815131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8722815161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4361407565 + 4361407566.

It is an arithmetic number, because the mean of its divisors is an integer number (4361407566).

Almost surely, 2^8722815131 is an apocalyptic number.

8722815131 is a deficient number, since it is larger than the sum of its proper divisors (1).

8722815131 is an equidigital number, since it uses as much as digits as its factorization.

8722815131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 38.

The square root of 8722815131 is about 93396.0123934636. The cubic root of 8722815131 is about 2058.5064055548.

The spelling of 8722815131 in words is "eight billion, seven hundred twenty-two million, eight hundred fifteen thousand, one hundred thirty-one".