22554521 has 12 divisors (see below), whose sum is σ = 25266276. Its totient is φ = 20111520.

The previous prime is 22554509. The next prime is 22554523. The reversal of 22554521 is 12545522.

It can be written as a sum of positive squares in 2 ways, for example, as 19456921 + 3097600 = 4411^2 + 1760^2 .

It is not a de Polignac number, because 22554521 - 2⁶ = 22554457 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22554523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4655 + ... + 8171.

It is an arithmetic number, because the mean of its divisors is an integer number (2105523).

Almost surely, 2^22554521 is an apocalyptic number.

It is an amenable number.

22554521 is a deficient number, since it is larger than the sum of its proper divisors (2711755).

22554521 is a wasteful number, since it uses less digits than its factorization.

22554521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592 (or 3581 counting only the distinct ones).

The product of its digits is 4000, while the sum is 26.

The square root of 22554521 is about 4749.1600309950. The cubic root of 22554521 is about 282.5386523978.

It can be divided in two parts, 2255 and 4521, that added together give a palindrome (6776).

The spelling of 22554521 in words is "twenty-two million, five hundred fifty-four thousand, five hundred twenty-one".