22551791 has 2 divisors, whose sum is σ = 22551792. Its totient is φ = 22551790.

The previous prime is 22551757. The next prime is 22551811. The reversal of 22551791 is 19715522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22551791 - 2¹⁰ = 22550767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22551701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11275895 + 11275896.

It is an arithmetic number, because the mean of its divisors is an integer number (11275896).

Almost surely, 2^22551791 is an apocalyptic number.

22551791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22551791 is an equidigital number, since it uses as much as digits as its factorization.

22551791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 32.

The square root of 22551791 is about 4748.8726030501. The cubic root of 22551791 is about 282.5272524418.

The spelling of 22551791 in words is "twenty-two million, five hundred fifty-one thousand, seven hundred ninety-one".