22116625 has 8 divisors (see below), whose sum is σ = 27601704. Its totient is φ = 17693200.

The previous prime is 22116613. The next prime is 22116637. The reversal of 22116625 is 52661122.

It is an interprime number because it is at equal distance from previous prime (22116613) and next prime (22116637).

It can be written as a sum of positive squares in 4 ways, for example, as 101761 + 22014864 = 319^2 + 4692^2 .

It is not a de Polignac number, because 22116625 - 2¹¹ = 22114577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22116625.

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 7 ways as a sum of consecutive naturals, for example, 88342 + ... + 88591.

It is an arithmetic number, because the mean of its divisors is an integer number (3450213).

Almost surely, 2^22116625 is an apocalyptic number.

22116625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22116625 is a deficient number, since it is larger than the sum of its proper divisors (5485079).

22116625 is an equidigital number, since it uses as much as digits as its factorization.

22116625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176948 (or 176938 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 22116625 is about 4702.8315938379. The cubic root of 22116625 is about 280.6981937968.

Adding to 22116625 its reverse (52661122), we get a palindrome (74777747).

It can be divided in two parts, 2211 and 6625, that added together give a square (8836 = 94²).

The spelling of 22116625 in words is "twenty-two million, one hundred sixteen thousand, six hundred twenty-five".