22991051 has 2 divisors, whose sum is σ = 22991052. Its totient is φ = 22991050.

The previous prime is 22991047. The next prime is 22991063. The reversal of 22991051 is 15019922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22991051 - 2² = 22991047 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22991011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11495525 + 11495526.

It is an arithmetic number, because the mean of its divisors is an integer number (11495526).

Almost surely, 2^22991051 is an apocalyptic number.

22991051 is a deficient number, since it is larger than the sum of its proper divisors (1).

22991051 is an equidigital number, since it uses as much as digits as its factorization.

22991051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 22991051 is about 4794.8984347950. The cubic root of 22991051 is about 284.3498094822.

The spelling of 22991051 in words is "twenty-two million, nine hundred ninety-one thousand, fifty-one".