22540521 has 8 divisors (see below), whose sum is σ = 31821984. Its totient is φ = 14143040.

The previous prime is 22540519. The next prime is 22540547. The reversal of 22540521 is 12504522.

It is a happy number.

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 22540521 - 2¹ = 22540519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22540501) 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, 220935 + ... + 221036.

It is an arithmetic number, because the mean of its divisors is an integer number (3977748).

Almost surely, 2^22540521 is an apocalyptic number.

It is an amenable number.

22540521 is a deficient number, since it is larger than the sum of its proper divisors (9281463).

22540521 is a wasteful number, since it uses less digits than its factorization.

22540521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441991.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 22540521 is about 4747.6858573414. The cubic root of 22540521 is about 282.4801813439.

The spelling of 22540521 in words is "twenty-two million, five hundred forty thousand, five hundred twenty-one".