22556749 has 2 divisors, whose sum is σ = 22556750. Its totient is φ = 22556748.

The previous prime is 22556731. The next prime is 22556753. The reversal of 22556749 is 94765522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20884900 + 1671849 = 4570^2 + 1293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22556749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22556789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11278374 + 11278375.

It is an arithmetic number, because the mean of its divisors is an integer number (11278375).

Almost surely, 2^22556749 is an apocalyptic number.

It is an amenable number.

22556749 is a deficient number, since it is larger than the sum of its proper divisors (1).

22556749 is an equidigital number, since it uses as much as digits as its factorization.

22556749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 22556749 is about 4749.3945929981. The cubic root of 22556749 is about 282.5479554165.

The spelling of 22556749 in words is "twenty-two million, five hundred fifty-six thousand, seven hundred forty-nine".