22756521 has 8 divisors (see below), whose sum is σ = 30365280. Its totient is φ = 15159392.

The previous prime is 22756519. The next prime is 22756537. The reversal of 22756521 is 12565722.

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

It is a cyclic number.

It is not a de Polignac number, because 22756521 - 2¹ = 22756519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22756501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4021 + ... + 7853.

It is an arithmetic number, because the mean of its divisors is an integer number (3795660).

Almost surely, 2^22756521 is an apocalyptic number.

It is an amenable number.

22756521 is a deficient number, since it is larger than the sum of its proper divisors (7608759).

22756521 is a wasteful number, since it uses less digits than its factorization.

22756521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815.

The product of its digits is 8400, while the sum is 30.

The square root of 22756521 is about 4770.3795446484. The cubic root of 22756521 is about 283.3796259616.

The spelling of 22756521 in words is "twenty-two million, seven hundred fifty-six thousand, five hundred twenty-one".