22594981 has 2 divisors, whose sum is σ = 22594982. Its totient is φ = 22594980.

The previous prime is 22594967. The next prime is 22594987. The reversal of 22594981 is 18949522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22184100 + 410881 = 4710^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 22594981 - 2⁹ = 22594469 is a prime.

It is a super-2 number, since 2×22594981² = 1021066332780722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22594987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11297490 + 11297491.

It is an arithmetic number, because the mean of its divisors is an integer number (11297491).

Almost surely, 2^22594981 is an apocalyptic number.

It is an amenable number.

22594981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22594981 is an equidigital number, since it uses as much as digits as its factorization.

22594981 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 22594981 is about 4753.4178229985. The cubic root of 22594981 is about 282.7074978532.

The spelling of 22594981 in words is "twenty-two million, five hundred ninety-four thousand, nine hundred eighty-one".