22017225 has 24 divisors (see below), whose sum is σ = 36645472. Its totient is φ = 11664000.

The previous prime is 22017199. The next prime is 22017251. The reversal of 22017225 is 52271022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22017199) and next prime (22017251).

It is not a de Polignac number, because 22017225 - 2¹⁰ = 22016201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11325 + ... + 13125.

Almost surely, 2^22017225 is an apocalyptic number.

22017225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22017225 is a deficient number, since it is larger than the sum of its proper divisors (14628247).

22017225 is a wasteful number, since it uses less digits than its factorization.

22017225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977 (or 1972 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 22017225 is about 4692.2515917201. The cubic root of 22017225 is about 280.2770429693.

Adding to 22017225 its reverse (52271022), we get a palindrome (74288247).

The spelling of 22017225 in words is "twenty-two million, seventeen thousand, two hundred twenty-five".