22532561 has 2 divisors, whose sum is σ = 22532562. Its totient is φ = 22532560.

The previous prime is 22532533. The next prime is 22532581. The reversal of 22532561 is 16523522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14776336 + 7756225 = 3844^2 + 2785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22532561 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22532561.

It is not a weakly prime, because it can be changed into another prime (22532501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11266280 + 11266281.

It is an arithmetic number, because the mean of its divisors is an integer number (11266281).

Almost surely, 2^22532561 is an apocalyptic number.

It is an amenable number.

22532561 is a deficient number, since it is larger than the sum of its proper divisors (1).

22532561 is an equidigital number, since it uses as much as digits as its factorization.

22532561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 22532561 is about 4746.8474801704. The cubic root of 22532561 is about 282.4469255763.

The spelling of 22532561 in words is "twenty-two million, five hundred thirty-two thousand, five hundred sixty-one".