22415232 has 128 divisors (see below), whose sum is σ = 70502400. Its totient is φ = 6174720.

The previous prime is 22415209. The next prime is 22415249. The reversal of 22415232 is 23251422.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×22415232² = 1004885251227648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 22415199 and 22415208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83194 + ... + 83462.

It is an arithmetic number, because the mean of its divisors is an integer number (550800).

Almost surely, 2^22415232 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 22415232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35251200).

22415232 is an abundant number, since it is smaller than the sum of its proper divisors (48087168).

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

22415232 is a wasteful number, since it uses less digits than its factorization.

22415232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 312 counting only the distinct ones).

The product of its digits is 960, while the sum is 21.

The square root of 22415232 is about 4734.4727267141. The cubic root of 22415232 is about 281.9558303136.

Adding to 22415232 its reverse (23251422), we get a palindrome (45666654).

The spelling of 22415232 in words is "twenty-two million, four hundred fifteen thousand, two hundred thirty-two".