22139569 has 2 divisors, whose sum is σ = 22139570. Its totient is φ = 22139568.

The previous prime is 22139567. The next prime is 22139581. The reversal of 22139569 is 96593122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 237169 = 4680^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 22139569 - 2¹ = 22139567 is a prime.

It is a super-2 number, since 2×22139569² = 980321031011522, which contains 22 as substring.

Together with 22139567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22139561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11069784 + 11069785.

It is an arithmetic number, because the mean of its divisors is an integer number (11069785).

Almost surely, 2^22139569 is an apocalyptic number.

It is an amenable number.

22139569 is a deficient number, since it is larger than the sum of its proper divisors (1).

22139569 is an equidigital number, since it uses as much as digits as its factorization.

22139569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 22139569 is about 4705.2703429240. The cubic root of 22139569 is about 280.7952265877.

The spelling of 22139569 in words is "twenty-two million, one hundred thirty-nine thousand, five hundred sixty-nine".