22501554 has 16 divisors (see below), whose sum is σ = 45291648. Its totient is φ = 7452432.

The previous prime is 22501543. The next prime is 22501561. The reversal of 22501554 is 45510522.

It is a happy number.

It is an unprimeable number.

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, 11002 + ... + 12885.

It is an arithmetic number, because the mean of its divisors is an integer number (2830728).

Almost surely, 2^22501554 is an apocalyptic number.

22501554 is an abundant number, since it is smaller than the sum of its proper divisors (22790094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22501554 is a wasteful number, since it uses less digits than its factorization.

22501554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24049.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 22501554 is about 4743.5802934071. The cubic root of 22501554 is about 282.3173079369.

The spelling of 22501554 in words is "twenty-two million, five hundred one thousand, five hundred fifty-four".