25223040 has 192 divisors, whose sum is σ = 90698400. Its totient is φ = 6451200.

The previous prime is 25223039. The next prime is 25223063. The reversal of 25223040 is 4032252.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 166965 + ... + 167115.

Almost surely, 2^25223040 is an apocalyptic number.

25223040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25223040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45349200).

25223040 is an abundant number, since it is smaller than the sum of its proper divisors (65475360).

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

25223040 is a wasteful number, since it uses less digits than its factorization.

25223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 25223040 is about 5022.2544738394. The cubic root of 25223040 is about 293.2687644841.

Adding to 25223040 its reverse (4032252), we get a palindrome (29255292).

The spelling of 25223040 in words is "twenty-five million, two hundred twenty-three thousand, forty".