25255560 has 192 divisors, whose sum is σ = 88879680. Its totient is φ = 5690880.

The previous prime is 25255553. The next prime is 25255561. The reversal of 25255560 is 6555252.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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 (25255561) 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, 476494 + ... + 476546.

It is an arithmetic number, because the mean of its divisors is an integer number (462915).

Almost surely, 2^25255560 is an apocalyptic number.

25255560 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 25255560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44439840).

25255560 is an abundant number, since it is smaller than the sum of its proper divisors (63624120).

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

25255560 is a wasteful number, since it uses less digits than its factorization.

25255560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 25255560 is about 5025.4910207859. The cubic root of 25255560 is about 293.3947472422.

The spelling of 25255560 in words is "twenty-five million, two hundred fifty-five thousand, five hundred sixty".