22051872 has 48 divisors (see below), whose sum is σ = 64320480. Its totient is φ = 7350336.

The previous prime is 22051859. The next prime is 22051879. The reversal of 22051872 is 27815022.

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

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22051879) 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, 11898 + ... + 13625.

It is an arithmetic number, because the mean of its divisors is an integer number (1340010).

Almost surely, 2^22051872 is an apocalyptic number.

It is an amenable number.

22051872 is an abundant number, since it is smaller than the sum of its proper divisors (42268608).

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

22051872 is a wasteful number, since it uses less digits than its factorization.

22051872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25542 (or 25528 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22051872 is about 4695.9420780074. The cubic root of 22051872 is about 280.4239835191.

Adding to 22051872 its reverse (27815022), we get a palindrome (49866894).

The spelling of 22051872 in words is "twenty-two million, fifty-one thousand, eight hundred seventy-two".