25145552 has 20 divisors (see below), whose sum is σ = 50400420. Its totient is φ = 12139008.

The previous prime is 25145543. The next prime is 25145599. The reversal of 25145552 is 25554152.

It can be written as a sum of positive squares in 2 ways, for example, as 17505856 + 7639696 = 4184^2 + 2764^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26633 + ... + 27560.

It is an arithmetic number, because the mean of its divisors is an integer number (2520021).

Almost surely, 2^25145552 is an apocalyptic number.

It is an amenable number.

25145552 is an abundant number, since it is smaller than the sum of its proper divisors (25254868).

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

25145552 is a wasteful number, since it uses less digits than its factorization.

25145552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54230 (or 54224 counting only the distinct ones).

The product of its digits is 10000, while the sum is 29.

The square root of 25145552 is about 5014.5340760633. The cubic root of 25145552 is about 292.9681382726.

The spelling of 25145552 in words is "twenty-five million, one hundred forty-five thousand, five hundred fifty-two".