22451538 has 16 divisors (see below), whose sum is σ = 45639936. Its totient is φ = 7361040.

The previous prime is 22451503. The next prime is 22451567. The reversal of 22451538 is 83515422.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30306 + ... + 31037.

It is an arithmetic number, because the mean of its divisors is an integer number (2852496).

Almost surely, 2^22451538 is an apocalyptic number.

22451538 is an abundant number, since it is smaller than the sum of its proper divisors (23188398).

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

22451538 is a wasteful number, since it uses less digits than its factorization.

22451538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61409.

The product of its digits is 9600, while the sum is 30.

The square root of 22451538 is about 4738.3053932814. The cubic root of 22451538 is about 282.1079763565.

The spelling of 22451538 in words is "twenty-two million, four hundred fifty-one thousand, five hundred thirty-eight".