22145969 has 2 divisors, whose sum is σ = 22145970. Its totient is φ = 22145968.

The previous prime is 22145953. The next prime is 22145971. The reversal of 22145969 is 96954122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15054400 + 7091569 = 3880^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 22145969 - 2⁴ = 22145953 is a prime.

It is a super-2 number, since 2×22145969² = 980887885897922, which contains 22 as substring.

Together with 22145971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22145939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11072984 + 11072985.

It is an arithmetic number, because the mean of its divisors is an integer number (11072985).

Almost surely, 2^22145969 is an apocalyptic number.

It is an amenable number.

22145969 is a deficient number, since it is larger than the sum of its proper divisors (1).

22145969 is an equidigital number, since it uses as much as digits as its factorization.

22145969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 22145969 is about 4705.9503822289. The cubic root of 22145969 is about 280.8222809583.

The spelling of 22145969 in words is "twenty-two million, one hundred forty-five thousand, nine hundred sixty-nine".