22117725 has 96 divisors (see below), whose sum is σ = 48250880. Its totient is φ = 9720000.

The previous prime is 22117723. The next prime is 22117727. The reversal of 22117725 is 52771122.

It is an interprime number because it is at equal distance from previous prime (22117723) and next prime (22117727).

It is not a de Polignac number, because 22117725 - 2¹ = 22117723 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22117723) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 146400 + ... + 146550.

Almost surely, 2^22117725 is an apocalyptic number.

22117725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22117725 is an abundant number, since it is smaller than the sum of its proper divisors (26133155).

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

22117725 is a wasteful number, since it uses less digits than its factorization.

22117725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 197 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 22117725 is about 4702.9485432014. The cubic root of 22117725 is about 280.7028473533.

Adding to 22117725 its reverse (52771122), we get a palindrome (74888847).

The spelling of 22117725 in words is "twenty-two million, one hundred seventeen thousand, seven hundred twenty-five".