22505869 has 2 divisors, whose sum is σ = 22505870. Its totient is φ = 22505868.

The previous prime is 22505837. The next prime is 22505881. The reversal of 22505869 is 96850522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11812969 + 10692900 = 3437^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 22505869 - 2⁵ = 22505837 is a prime.

It is a super-2 number, since 2×22505869² = 1013028278890322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22505369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11252934 + 11252935.

It is an arithmetic number, because the mean of its divisors is an integer number (11252935).

Almost surely, 2^22505869 is an apocalyptic number.

It is an amenable number.

22505869 is a deficient number, since it is larger than the sum of its proper divisors (1).

22505869 is an equidigital number, since it uses as much as digits as its factorization.

22505869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 22505869 is about 4744.0350968348. The cubic root of 22505869 is about 282.3353529324.

The spelling of 22505869 in words is "twenty-two million, five hundred five thousand, eight hundred sixty-nine".