22528551 has 8 divisors (see below), whose sum is σ = 30605040. Its totient is φ = 14735552.

The previous prime is 22528543. The next prime is 22528573. The reversal of 22528551 is 15582522.

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 22528551 - 2³ = 22528543 is a prime.

It is a super-3 number, since 3×22528551³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22528511) 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, 70686 + ... + 71003.

It is an arithmetic number, because the mean of its divisors is an integer number (3825630).

Almost surely, 2^22528551 is an apocalyptic number.

22528551 is a deficient number, since it is larger than the sum of its proper divisors (8076489).

22528551 is a wasteful number, since it uses less digits than its factorization.

22528551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141745.

The product of its digits is 8000, while the sum is 30.

The square root of 22528551 is about 4746.4250757807. The cubic root of 22528551 is about 282.4301693901.

The spelling of 22528551 in words is "twenty-two million, five hundred twenty-eight thousand, five hundred fifty-one".