22749825 has 48 divisors (see below), whose sum is σ = 45532800. Its totient is φ = 9784320.

The previous prime is 22749803. The next prime is 22749827. The reversal of 22749825 is 52894722.

It is not a de Polignac number, because 22749825 - 2⁶ = 22749761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22749827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7651 + ... + 10199.

It is an arithmetic number, because the mean of its divisors is an integer number (948600).

It is the magic constant of a 357 × 357 magic square.

Almost surely, 2^22749825 is an apocalyptic number.

22749825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22749825 is an abundant number, since it is smaller than the sum of its proper divisors (22782975).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22749825 is a wasteful number, since it uses less digits than its factorization.

22749825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586 (or 2581 counting only the distinct ones).

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

The square root of 22749825 is about 4769.6776620648. The cubic root of 22749825 is about 283.3518288580.

The spelling of 22749825 in words is "twenty-two million, seven hundred forty-nine thousand, eight hundred twenty-five".