22575521 has 2 divisors, whose sum is σ = 22575522. Its totient is φ = 22575520.

The previous prime is 22575503. The next prime is 22575569. The reversal of 22575521 is 12557522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13424896 + 9150625 = 3664^2 + 3025^2 .

It is a cyclic number.

It is not a de Polignac number, because 22575521 - 2⁶ = 22575457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22575571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11287760 + 11287761.

It is an arithmetic number, because the mean of its divisors is an integer number (11287761).

Almost surely, 2^22575521 is an apocalyptic number.

It is an amenable number.

22575521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22575521 is an equidigital number, since it uses as much as digits as its factorization.

22575521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7000, while the sum is 29.

The square root of 22575521 is about 4751.3704338854. The cubic root of 22575521 is about 282.6263136284.

The spelling of 22575521 in words is "twenty-two million, five hundred seventy-five thousand, five hundred twenty-one".