22217925 has 24 divisors (see below), whose sum is σ = 37363680. Its totient is φ = 11646400.

The previous prime is 22217911. The next prime is 22217927. The reversal of 22217925 is 52971222.

It is not a de Polignac number, because 22217925 - 2⁹ = 22217413 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 22217892 and 22217901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22217927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1915 + ... + 6935.

It is an arithmetic number, because the mean of its divisors is an integer number (1556820).

Almost surely, 2^22217925 is an apocalyptic number.

22217925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22217925 is a deficient number, since it is larger than the sum of its proper divisors (15145755).

22217925 is a wasteful number, since it uses less digits than its factorization.

22217925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5093 (or 5088 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 22217925 is about 4713.5893966276. The cubic root of 22217925 is about 281.1260985110.

The spelling of 22217925 in words is "twenty-two million, two hundred seventeen thousand, nine hundred twenty-five".