22521769 has 2 divisors, whose sum is σ = 22521770. Its totient is φ = 22521768.

The previous prime is 22521757. The next prime is 22521773. The reversal of 22521769 is 96712522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 619369 = 4680^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 22521769 - 2¹⁵ = 22489001 is a prime.

It is a super-2 number, since 2×22521769² = 1014460157778722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22522769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260884 + 11260885.

It is an arithmetic number, because the mean of its divisors is an integer number (11260885).

Almost surely, 2^22521769 is an apocalyptic number.

It is an amenable number.

22521769 is a deficient number, since it is larger than the sum of its proper divisors (1).

22521769 is an equidigital number, since it uses as much as digits as its factorization.

22521769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 22521769 is about 4745.7105895745. The cubic root of 22521769 is about 282.4018255987.

The spelling of 22521769 in words is "twenty-two million, five hundred twenty-one thousand, seven hundred sixty-nine".