22615272 has 96 divisors (see below), whose sum is σ = 64471680. Its totient is φ = 7153920.

The previous prime is 22615267. The next prime is 22615289. The reversal of 22615272 is 27251622.

22615272 is a `hidden beast` number, since 22 + 615 + 27 + 2 = 666.

It is a super-2 number, since 2×22615272² = 1022901055267968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138663 + ... + 138825.

It is an arithmetic number, because the mean of its divisors is an integer number (671580).

Almost surely, 2^22615272 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 22615272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32235840).

22615272 is an abundant number, since it is smaller than the sum of its proper divisors (41856408).

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

22615272 is a wasteful number, since it uses less digits than its factorization.

22615272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 256 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 22615272 is about 4755.5517030099. The cubic root of 22615272 is about 282.7920992600.

Adding to 22615272 its reverse (27251622), we get a palindrome (49866894).

The spelling of 22615272 in words is "twenty-two million, six hundred fifteen thousand, two hundred seventy-two".