22199591 has 2 divisors, whose sum is σ = 22199592. Its totient is φ = 22199590.

The previous prime is 22199563. The next prime is 22199599. The reversal of 22199591 is 19599122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22199591 - 2¹⁴ = 22183207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22199599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11099795 + 11099796.

It is an arithmetic number, because the mean of its divisors is an integer number (11099796).

Almost surely, 2^22199591 is an apocalyptic number.

22199591 is a deficient number, since it is larger than the sum of its proper divisors (1).

22199591 is an equidigital number, since it uses as much as digits as its factorization.

22199591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 38.

The square root of 22199591 is about 4711.6441928482. The cubic root of 22199591 is about 281.0487497898.

The spelling of 22199591 in words is "twenty-two million, one hundred ninety-nine thousand, five hundred ninety-one".