22161499 has 2 divisors, whose sum is σ = 22161500. Its totient is φ = 22161498.

The previous prime is 22161479. The next prime is 22161509. The reversal of 22161499 is 99416122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22161499 - 2⁷ = 22161371 is a prime.

It is a super-2 number, since 2×22161499² = 982264075854002, which contains 22 as substring.

It is equal to p_1398751 and since 22161499 and 1398751 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (22161449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11080749 + 11080750.

It is an arithmetic number, because the mean of its divisors is an integer number (11080750).

Almost surely, 2^22161499 is an apocalyptic number.

22161499 is a deficient number, since it is larger than the sum of its proper divisors (1).

22161499 is an equidigital number, since it uses as much as digits as its factorization.

22161499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 22161499 is about 4707.6001317019. The cubic root of 22161499 is about 280.8879084169.

The spelling of 22161499 in words is "twenty-two million, one hundred sixty-one thousand, four hundred ninety-nine".