22721952 has 48 divisors (see below), whose sum is σ = 65070432. Its totient is φ = 6885120.

The previous prime is 22721947. The next prime is 22721987. The reversal of 22721952 is 25912722.

It is a tau number, because it is divible by the number of its divisors (48).

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, 9703 + ... + 11814.

It is an arithmetic number, because the mean of its divisors is an integer number (1355634).

Almost surely, 2^22721952 is an apocalyptic number.

22721952 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22721952 is an abundant number, since it is smaller than the sum of its proper divisors (42348480).

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

22721952 is a wasteful number, since it uses less digits than its factorization.

22721952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21541 (or 21533 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 22721952 is about 4766.7548709788. The cubic root of 22721952 is about 283.2360610341.

It can be divided in two parts, 2272 and 1952, that added together give a palindrome (4224).

The spelling of 22721952 in words is "twenty-two million, seven hundred twenty-one thousand, nine hundred fifty-two".