25553280 has 64 divisors (see below), whose sum is σ = 81457200. Its totient is φ = 6813696.

The previous prime is 25553279. The next prime is 25553287. The reversal of 25553280 is 8235552.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25553287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4735 + ... + 8574.

Almost surely, 2^25553280 is an apocalyptic number.

25553280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25553280 is an abundant number, since it is smaller than the sum of its proper divisors (55903920).

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

25553280 is a wasteful number, since it uses less digits than its factorization.

25553280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13331 (or 13319 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 25553280 is about 5055.0252224890. The cubic root of 25553280 is about 294.5431211798.

It can be divided in two parts, 255 and 53280, that added together give a palindrome (53535).

The spelling of 25553280 in words is "twenty-five million, five hundred fifty-three thousand, two hundred eighty".