22445520 has 40 divisors (see below), whose sum is σ = 69581856. Its totient is φ = 5985408.

The previous prime is 22445503. The next prime is 22445531. The reversal of 22445520 is 2554422.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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

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, 46522 + ... + 47001.

Almost surely, 2^22445520 is an apocalyptic number.

22445520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22445520 is an abundant number, since it is smaller than the sum of its proper divisors (47136336).

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

22445520 is a wasteful number, since it uses less digits than its factorization.

22445520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93539 (or 93533 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 22445520 is about 4737.6703135613. The cubic root of 22445520 is about 282.0827683208.

Adding to 22445520 its reverse (2554422), we get a palindrome (24999942).

The spelling of 22445520 in words is "twenty-two million, four hundred forty-five thousand, five hundred twenty".