25551560 has 32 divisors (see below), whose sum is σ = 58010040. Its totient is φ = 10128384.

The previous prime is 25551557. The next prime is 25551577. The reversal of 25551560 is 6515552.

It can be written as a sum of positive squares in 4 ways, for example, as 16467364 + 9084196 = 4058^2 + 3014^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1694 + ... + 7346.

Almost surely, 2^25551560 is an apocalyptic number.

25551560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25551560 is an abundant number, since it is smaller than the sum of its proper divisors (32458480).

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

25551560 is a wasteful number, since it uses less digits than its factorization.

25551560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5777 (or 5773 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 25551560 is about 5054.8550918894. The cubic root of 25551560 is about 294.5365124322.

It can be divided in two parts, 255 and 51560, that added together give a palindrome (51815).

The spelling of 25551560 in words is "twenty-five million, five hundred fifty-one thousand, five hundred sixty".