22472520 has 128 divisors (see below), whose sum is σ = 79626240. Its totient is φ = 4965120.

The previous prime is 22472519. The next prime is 22472543. The reversal of 22472520 is 2527422.

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

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 31 ways as a sum of consecutive naturals, for example, 25609 + ... + 26471.

It is an arithmetic number, because the mean of its divisors is an integer number (622080).

Almost surely, 2^22472520 is an apocalyptic number.

22472520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22472520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39813120).

22472520 is an abundant number, since it is smaller than the sum of its proper divisors (57153720).

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

22472520 is a wasteful number, since it uses less digits than its factorization.

22472520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 911 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 22472520 is about 4740.5189589327. The cubic root of 22472520 is about 282.1958299755.

Adding to 22472520 its reverse (2527422), we get a palindrome (24999942).

The spelling of 22472520 in words is "twenty-two million, four hundred seventy-two thousand, five hundred twenty".