8661522931 has 2 divisors, whose sum is σ = 8661522932. Its totient is φ = 8661522930.

The previous prime is 8661522871. The next prime is 8661522973. The reversal of 8661522931 is 1392251668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8661522931 - 2¹⁵ = 8661490163 is a prime.

It is a super-2 number, since 2×8661522931² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8661522731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4330761465 + 4330761466.

It is an arithmetic number, because the mean of its divisors is an integer number (4330761466).

Almost surely, 2^8661522931 is an apocalyptic number.

8661522931 is a deficient number, since it is larger than the sum of its proper divisors (1).

8661522931 is an equidigital number, since it uses as much as digits as its factorization.

8661522931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 8661522931 is about 93067.3032326606. The cubic root of 8661522931 is about 2053.6735978741.

The spelling of 8661522931 in words is "eight billion, six hundred sixty-one million, five hundred twenty-two thousand, nine hundred thirty-one".