22051332 has 48 divisors (see below), whose sum is σ = 57523200. Its totient is φ = 7305120.

The previous prime is 22051331. The next prime is 22051369. The reversal of 22051332 is 23315022.

It is a super-2 number, since 2×22051332² = 972522485948448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22051331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20094 + ... + 21162.

It is an arithmetic number, because the mean of its divisors is an integer number (1198400).

Almost surely, 2^22051332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22051332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28761600).

22051332 is an abundant number, since it is smaller than the sum of its proper divisors (35471868).

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

22051332 is a wasteful number, since it uses less digits than its factorization.

22051332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 22051332 is about 4695.8845812051. The cubic root of 22051332 is about 280.4216945193.

Adding to 22051332 its reverse (23315022), we get a palindrome (45366354).

The spelling of 22051332 in words is "twenty-two million, fifty-one thousand, three hundred thirty-two".