22658681 has 2 divisors, whose sum is σ = 22658682. Its totient is φ = 22658680.

The previous prime is 22658639. The next prime is 22658683. The reversal of 22658681 is 18685622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 9554281 = 3620^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 22658681 - 2⁶ = 22658617 is a prime.

It is a super-2 number, since 2×22658681² = 1026831649319522, which contains 22 as substring.

Together with 22658683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22658683) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11329340 + 11329341.

It is an arithmetic number, because the mean of its divisors is an integer number (11329341).

Almost surely, 2^22658681 is an apocalyptic number.

It is an amenable number.

22658681 is a deficient number, since it is larger than the sum of its proper divisors (1).

22658681 is an equidigital number, since it uses as much as digits as its factorization.

22658681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 38.

The square root of 22658681 is about 4760.1135490658. The cubic root of 22658681 is about 282.9729191998.

The spelling of 22658681 in words is "twenty-two million, six hundred fifty-eight thousand, six hundred eighty-one".