22056997 has 4 divisors (see below), whose sum is σ = 22192480. Its totient is φ = 21921516.

The previous prime is 22056989. The next prime is 22057019. The reversal of 22056997 is 79965022.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 22056997 - 2³ = 22056989 is a prime.

It is a super-2 number, since 2×22056997² = 973022233316018, 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 (22059997) 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, 67497 + ... + 67822.

It is an arithmetic number, because the mean of its divisors is an integer number (5548120).

Almost surely, 2^22056997 is an apocalyptic number.

It is an amenable number.

22056997 is a deficient number, since it is larger than the sum of its proper divisors (135483).

22056997 is a wasteful number, since it uses less digits than its factorization.

22056997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135482.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 22056997 is about 4696.4877302086. The cubic root of 22056997 is about 280.4457059620.

The spelling of 22056997 in words is "twenty-two million, fifty-six thousand, nine hundred ninety-seven".