8631022981 has 4 divisors (see below), whose sum is σ = 9864026272. Its totient is φ = 7398019692.

The previous prime is 8631022963. The next prime is 8631022999. The reversal of 8631022981 is 1892201368.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (8631022963) and next prime (8631022999).

It is not a de Polignac number, because 8631022981 - 2⁷ = 8631022853 is a prime.

It is a super-2 number, since 2×8631022981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8631022951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616501635 + ... + 616501648.

It is an arithmetic number, because the mean of its divisors is an integer number (2466006568).

Almost surely, 2^8631022981 is an apocalyptic number.

It is an amenable number.

8631022981 is a deficient number, since it is larger than the sum of its proper divisors (1233003291).

8631022981 is a wasteful number, since it uses less digits than its factorization.

8631022981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233003290.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 8631022981 is about 92903.2990856622. The cubic root of 8631022981 is about 2051.2602190651.

The spelling of 8631022981 in words is "eight billion, six hundred thirty-one million, twenty-two thousand, nine hundred eighty-one".