22510825 has 12 divisors (see below), whose sum is σ = 27998208. Its totient is φ = 17954000.

The previous prime is 22510823. The next prime is 22510841. The reversal of 22510825 is 52801522.

It is not a de Polignac number, because 22510825 - 2¹ = 22510823 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 22510825.

It is not an unprimeable number, because it can be changed into a prime (22510823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8400 + ... + 10750.

It is an arithmetic number, because the mean of its divisors is an integer number (2333184).

Almost surely, 2^22510825 is an apocalyptic number.

22510825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22510825 is a deficient number, since it is larger than the sum of its proper divisors (5487383).

22510825 is a wasteful number, since it uses less digits than its factorization.

22510825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744 (or 2739 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 22510825 is about 4744.5574082310. The cubic root of 22510825 is about 282.3560756945.

The spelling of 22510825 in words is "twenty-two million, five hundred ten thousand, eight hundred twenty-five".