22291232 has 48 divisors (see below), whose sum is σ = 47319552. Its totient is φ = 10306560.

The previous prime is 22291229. The next prime is 22291253. The reversal of 22291232 is 23219222.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 22291198 and 22291207.

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, 22328 + ... + 23304.

It is an arithmetic number, because the mean of its divisors is an integer number (985824).

Almost surely, 2^22291232 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 22291232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23659776).

22291232 is an abundant number, since it is smaller than the sum of its proper divisors (25028320).

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

22291232 is a wasteful number, since it uses less digits than its factorization.

22291232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1033 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 22291232 is about 4721.3591263533. The cubic root of 22291232 is about 281.4349465358.

The spelling of 22291232 in words is "twenty-two million, two hundred ninety-one thousand, two hundred thirty-two".