22400631 has 40 divisors (see below), whose sum is σ = 37728768. Its totient is φ = 13122000.

The previous prime is 22400627. The next prime is 22400647. The reversal of 22400631 is 13600422.

It is a happy number.

It is not a de Polignac number, because 22400631 - 2² = 22400627 is a prime.

It is a super-2 number, since 2×22400631² = 1003576538396322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400681) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27216 + ... + 28026.

Almost surely, 2^22400631 is an apocalyptic number.

22400631 is a deficient number, since it is larger than the sum of its proper divisors (15328137).

22400631 is a wasteful number, since it uses less digits than its factorization.

22400631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 22400631 is about 4732.9304875521. The cubic root of 22400631 is about 281.8945961896.

The spelling of 22400631 in words is "twenty-two million, four hundred thousand, six hundred thirty-one".