25513984 has 26 divisors (see below), whose sum is σ = 51029930. Its totient is φ = 12754944.

The previous prime is 25513981. The next prime is 25513987. The reversal of 25513984 is 48931552.

It is an interprime number because it is at equal distance from previous prime (25513981) and next prime (25513987).

It can be written as a sum of positive squares in only one way, i.e., 21827584 + 3686400 = 4672^2 + 1920^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25513981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982 + ... + 7210.

Almost surely, 2^25513984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25513984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25514965).

25513984 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25513984 is an frugal number, since it uses more digits than its factorization.

25513984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6253 (or 6231 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 25513984 is about 5051.1369017282. The cubic root of 25513984 is about 294.3920602774.

The spelling of 25513984 in words is "twenty-five million, five hundred thirteen thousand, nine hundred eighty-four".