22731772 has 24 divisors (see below), whose sum is σ = 46212320. Its totient is φ = 9581760.

The previous prime is 22731763. The next prime is 22731781. The reversal of 22731772 is 27713722.

It is an interprime number because it is at equal distance from previous prime (22731763) and next prime (22731781).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4947 + ... + 8362.

Almost surely, 2^22731772 is an apocalyptic number.

It is an amenable number.

22731772 is an abundant number, since it is smaller than the sum of its proper divisors (23480548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22731772 is a wasteful number, since it uses less digits than its factorization.

22731772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13381 (or 13379 counting only the distinct ones).

The product of its digits is 8232, while the sum is 31.

The square root of 22731772 is about 4767.7848105803. The cubic root of 22731772 is about 283.2768582556.

The spelling of 22731772 in words is "twenty-two million, seven hundred thirty-one thousand, seven hundred seventy-two".