22512897 has 30 divisors (see below), whose sum is σ = 36981714. Its totient is φ = 13638240.

The previous prime is 22512869. The next prime is 22512901. The reversal of 22512897 is 79821522.

It can be written as a sum of positive squares in only one way, i.e., 18974736 + 3538161 = 4356^2 + 1881^2 .

It is not a de Polignac number, because 22512897 - 2²² = 18318593 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22512697) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 8653 + ... + 10949.

Almost surely, 2^22512897 is an apocalyptic number.

22512897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

22512897 is a deficient number, since it is larger than the sum of its proper divisors (14468817).

22512897 is a wasteful number, since it uses less digits than its factorization.

22512897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331 (or 2311 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 22512897 is about 4744.7757586634. The cubic root of 22512897 is about 282.3647385466.

It can be divided in two parts, 22512 and 897, that added together give a square (23409 = 153²).

The spelling of 22512897 in words is "twenty-two million, five hundred twelve thousand, eight hundred ninety-seven".