22556687 has 2 divisors, whose sum is σ = 22556688. Its totient is φ = 22556686.

The previous prime is 22556669. The next prime is 22556701. The reversal of 22556687 is 78665522.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22556687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22556627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11278343 + 11278344.

It is an arithmetic number, because the mean of its divisors is an integer number (11278344).

Almost surely, 2^22556687 is an apocalyptic number.

22556687 is a deficient number, since it is larger than the sum of its proper divisors (1).

22556687 is an equidigital number, since it uses as much as digits as its factorization.

22556687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The square root of 22556687 is about 4749.3880658460. The cubic root of 22556687 is about 282.5476965437.

The spelling of 22556687 in words is "twenty-two million, five hundred fifty-six thousand, six hundred eighty-seven".