22497285 has 24 divisors (see below), whose sum is σ = 36612576. Its totient is φ = 11795680.

The previous prime is 22497271. The next prime is 22497287. The reversal of 22497285 is 58279422.

It is not a de Polignac number, because 22497285 - 2⁵ = 22497253 is a prime.

It is a super-2 number, since 2×22497285² = 1012255664742450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22497287) 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, 171670 + ... + 171800.

It is an arithmetic number, because the mean of its divisors is an integer number (1525524).

Almost surely, 2^22497285 is an apocalyptic number.

It is an amenable number.

22497285 is a deficient number, since it is larger than the sum of its proper divisors (14115291).

22497285 is a wasteful number, since it uses less digits than its factorization.

22497285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 246 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 22497285 is about 4743.1302954905. The cubic root of 22497285 is about 282.2994530395.

The spelling of 22497285 in words is "twenty-two million, four hundred ninety-seven thousand, two hundred eighty-five".