22362581 has 2 divisors, whose sum is σ = 22362582. Its totient is φ = 22362580.

The previous prime is 22362577. The next prime is 22362629. The reversal of 22362581 is 18526322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 10182481 = 3490^2 + 3191^2 .

It is a cyclic number.

It is not a de Polignac number, because 22362581 - 2² = 22362577 is a prime.

It is a super-2 number, since 2×22362581² = 1000170057963122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22362521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11181290 + 11181291.

It is an arithmetic number, because the mean of its divisors is an integer number (11181291).

Almost surely, 2^22362581 is an apocalyptic number.

It is an amenable number.

22362581 is a deficient number, since it is larger than the sum of its proper divisors (1).

22362581 is an equidigital number, since it uses as much as digits as its factorization.

22362581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 22362581 is about 4728.9090708112. The cubic root of 22362581 is about 281.7348958032.

The spelling of 22362581 in words is "twenty-two million, three hundred sixty-two thousand, five hundred eighty-one".