22775621 has 8 divisors (see below), whose sum is σ = 25161600. Its totient is φ = 20442240.

The previous prime is 22775611. The next prime is 22775633. The reversal of 22775621 is 12657722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22775621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22775611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12236 + ... + 13973.

It is an arithmetic number, because the mean of its divisors is an integer number (3145200).

Almost surely, 2^22775621 is an apocalyptic number.

It is an amenable number.

22775621 is a deficient number, since it is larger than the sum of its proper divisors (2385979).

22775621 is a wasteful number, since it uses less digits than its factorization.

22775621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26299.

The product of its digits is 11760, while the sum is 32.

The square root of 22775621 is about 4772.3810619019. The cubic root of 22775621 is about 283.4588858402.

The spelling of 22775621 in words is "twenty-two million, seven hundred seventy-five thousand, six hundred twenty-one".