22556731 has 2 divisors, whose sum is σ = 22556732. Its totient is φ = 22556730.

The previous prime is 22556707. The next prime is 22556749. The reversal of 22556731 is 13765522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22556731 - 2¹¹ = 22554683 is a prime.

It is a super-2 number, since 2×22556731² = 1017612226812722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22556693 and 22556702.

It is not a weakly prime, because it can be changed into another prime (22556701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11278365 + 11278366.

It is an arithmetic number, because the mean of its divisors is an integer number (11278366).

Almost surely, 2^22556731 is an apocalyptic number.

22556731 is a deficient number, since it is larger than the sum of its proper divisors (1).

22556731 is an equidigital number, since it uses as much as digits as its factorization.

22556731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 22556731 is about 4749.3926980194. The cubic root of 22556731 is about 282.5478802599.

The spelling of 22556731 in words is "twenty-two million, five hundred fifty-six thousand, seven hundred thirty-one".