22991567 has 2 divisors, whose sum is σ = 22991568. Its totient is φ = 22991566.

The previous prime is 22991509. The next prime is 22991593. The reversal of 22991567 is 76519922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22991567 - 2⁶ = 22991503 is a prime.

It is a super-2 number, since 2×22991567² = 1057224306230978, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22991167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11495783 + 11495784.

It is an arithmetic number, because the mean of its divisors is an integer number (11495784).

Almost surely, 2^22991567 is an apocalyptic number.

22991567 is a deficient number, since it is larger than the sum of its proper divisors (1).

22991567 is an equidigital number, since it uses as much as digits as its factorization.

22991567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 22991567 is about 4794.9522416808. The cubic root of 22991567 is about 284.3519367360.

The spelling of 22991567 in words is "twenty-two million, nine hundred ninety-one thousand, five hundred sixty-seven".