22161599 has 2 divisors, whose sum is σ = 22161600. Its totient is φ = 22161598.

The previous prime is 22161577. The next prime is 22161617. The reversal of 22161599 is 99516122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22161599 - 2⁸ = 22161343 is a prime.

It is a super-2 number, since 2×22161599² = 982272940473602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22161509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11080799 + 11080800.

It is an arithmetic number, because the mean of its divisors is an integer number (11080800).

Almost surely, 2^22161599 is an apocalyptic number.

22161599 is a deficient number, since it is larger than the sum of its proper divisors (1).

22161599 is an equidigital number, since it uses as much as digits as its factorization.

22161599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 22161599 is about 4707.6107528129. The cubic root of 22161599 is about 280.8883309026. Note that the first 3 decimals are identical.

The spelling of 22161599 in words is "twenty-two million, one hundred sixty-one thousand, five hundred ninety-nine".