22555791 has 6 divisors (see below), whose sum is σ = 32580600. Its totient is φ = 15037188.

The previous prime is 22555739. The next prime is 22555807. The reversal of 22555791 is 19755522.

It is not a de Polignac number, because 22555791 - 2⁶ = 22555727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22555721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1253091 + ... + 1253108.

It is an arithmetic number, because the mean of its divisors is an integer number (5430100).

Almost surely, 2^22555791 is an apocalyptic number.

22555791 is a deficient number, since it is larger than the sum of its proper divisors (10024809).

22555791 is a wasteful number, since it uses less digits than its factorization.

22555791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506205 (or 2506202 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 22555791 is about 4749.2937369676. The cubic root of 22555791 is about 282.5439553606.

The spelling of 22555791 in words is "twenty-two million, five hundred fifty-five thousand, seven hundred ninety-one".