25223730 has 48 divisors (see below), whose sum is σ = 70424640. Its totient is φ = 5765088.

The previous prime is 25223713. The next prime is 25223741. The reversal of 25223730 is 3732252.

It is a super-2 number, since 2×25223730² = 1272473110225800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25223730.

It is a congruent 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, 7110 + ... + 10049.

It is an arithmetic number, because the mean of its divisors is an integer number (1467180).

Almost surely, 2^25223730 is an apocalyptic number.

25223730 is an abundant number, since it is smaller than the sum of its proper divisors (45200910).

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

25223730 is a wasteful number, since it uses less digits than its factorization.

25223730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17183 (or 17176 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 25223730 is about 5022.3231676187. The cubic root of 25223730 is about 293.2714386741.

Adding to 25223730 its reverse (3732252), we get a palindrome (28955982).

The spelling of 25223730 in words is "twenty-five million, two hundred twenty-three thousand, seven hundred thirty".