22461144 has 32 divisors (see below), whose sum is σ = 56368320. Its totient is φ = 7458336.

The previous prime is 22461139. The next prime is 22461157. The reversal of 22461144 is 44116422.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 5139 + ... + 8445.

It is an arithmetic number, because the mean of its divisors is an integer number (1761510).

Almost surely, 2^22461144 is an apocalyptic number.

22461144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22461144 is an abundant number, since it is smaller than the sum of its proper divisors (33907176).

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

22461144 is a wasteful number, since it uses less digits than its factorization.

22461144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599 (or 3595 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 22461144 is about 4739.3189384130. The cubic root of 22461144 is about 282.1482043775.

Adding to 22461144 its reverse (44116422), we get a palindrome (66577566).

The spelling of 22461144 in words is "twenty-two million, four hundred sixty-one thousand, one hundred forty-four".