22994581 has 2 divisors, whose sum is σ = 22994582. Its totient is φ = 22994580.

The previous prime is 22994567. The next prime is 22994597. The reversal of 22994581 is 18549922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20848356 + 2146225 = 4566^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 22994581 - 2⁷ = 22994453 is a prime.

It is a super-2 number, since 2×22994581² = 1057501510731122, which contains 22 as substring.

It is equal to p_1447897 and since 22994581 and 1447897 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22992581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11497290 + 11497291.

It is an arithmetic number, because the mean of its divisors is an integer number (11497291).

Almost surely, 2^22994581 is an apocalyptic number.

It is an amenable number.

22994581 is a deficient number, since it is larger than the sum of its proper divisors (1).

22994581 is an equidigital number, since it uses as much as digits as its factorization.

22994581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 22994581 is about 4795.2665202260. The cubic root of 22994581 is about 284.3643615712.

The spelling of 22994581 in words is "twenty-two million, nine hundred ninety-four thousand, five hundred eighty-one".