22451044 has 24 divisors (see below), whose sum is σ = 48984768. Its totient is φ = 8747040.

The previous prime is 22451041. The next prime is 22451047. The reversal of 22451044 is 44015422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22451041) and next prime (22451047).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (22451041) 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, 36139 + ... + 36754.

It is an arithmetic number, because the mean of its divisors is an integer number (2041032).

Almost surely, 2^22451044 is an apocalyptic number.

It is an amenable number.

22451044 is an abundant number, since it is smaller than the sum of its proper divisors (26533724).

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

22451044 is a wasteful number, since it uses less digits than its factorization.

22451044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72915 (or 72913 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 22451044 is about 4738.2532646535. The cubic root of 22451044 is about 282.1059072724.

Adding to 22451044 its reverse (44015422), we get a palindrome (66466466).

The spelling of 22451044 in words is "twenty-two million, four hundred fifty-one thousand, forty-four".