972222631 has 4 divisors (see below), whose sum is σ = 973594600. Its totient is φ = 970850664.

The previous prime is 972222617. The next prime is 972222637. The reversal of 972222631 is 136222279.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 972222631 - 2⁵ = 972222599 is a prime.

It is a super-2 number, since 2×972222631² = 1890433688457124322, which 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 (972222637) 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, 684921 + ... + 686338.

It is an arithmetic number, because the mean of its divisors is an integer number (243398650).

Almost surely, 2^972222631 is an apocalyptic number.

972222631 is a deficient number, since it is larger than the sum of its proper divisors (1371969).

972222631 is a wasteful number, since it uses less digits than its factorization.

972222631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371968.

The product of its digits is 18144, while the sum is 34.

The square root of 972222631 is about 31180.4847781429. The cubic root of 972222631 is about 990.6537976363.

The spelling of 972222631 in words is "nine hundred seventy-two million, two hundred twenty-two thousand, six hundred thirty-one".