22722391 has 2 divisors, whose sum is σ = 22722392. Its totient is φ = 22722390.

The previous prime is 22722311. The next prime is 22722407. The reversal of 22722391 is 19322722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22722391 - 2⁷ = 22722263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22722311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11361195 + 11361196.

It is an arithmetic number, because the mean of its divisors is an integer number (11361196).

Almost surely, 2^22722391 is an apocalyptic number.

22722391 is a deficient number, since it is larger than the sum of its proper divisors (1).

22722391 is an equidigital number, since it uses as much as digits as its factorization.

22722391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 22722391 is about 4766.8009188553. The cubic root of 22722391 is about 283.2378851120.

The spelling of 22722391 in words is "twenty-two million, seven hundred twenty-two thousand, three hundred ninety-one".