25555552 has 48 divisors (see below), whose sum is σ = 55641600. Its totient is φ = 11456640.

The previous prime is 25555531. The next prime is 25555561.

25555552 is nontrivially palindromic in base 10.

It is a congruent number.

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, 27349 + ... + 28267.

It is an arithmetic number, because the mean of its divisors is an integer number (1159200).

Almost surely, 2^25555552 is an apocalyptic number.

25555552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25555552 is the 2528-th decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25555552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27820800).

25555552 is an abundant number, since it is smaller than the sum of its proper divisors (30086048).

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

25555552 is a wasteful number, since it uses less digits than its factorization.

25555552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019 (or 1011 counting only the distinct ones).

The product of its digits is 62500, while the sum is 34.

The square root of 25555552 is about 5055.2499443648. The cubic root of 25555552 is about 294.5518504197.

The spelling of 25555552 in words is "twenty-five million, five hundred fifty-five thousand, five hundred fifty-two".