25513983 has 12 divisors (see below), whose sum is σ = 40204008. Its totient is φ = 15462960.

The previous prime is 25513981. The next prime is 25513987. The reversal of 25513983 is 38931552.

It is not a de Polignac number, because 25513983 - 2¹ = 25513981 is a prime.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128760 + ... + 128957.

It is an arithmetic number, because the mean of its divisors is an integer number (3350334).

Almost surely, 2^25513983 is an apocalyptic number.

25513983 is a deficient number, since it is larger than the sum of its proper divisors (14690025).

25513983 is a wasteful number, since it uses less digits than its factorization.

25513983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257734 (or 257731 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 25513983 is about 5051.1368027405. The cubic root of 25513983 is about 294.3920564312.

Subtracting 25513983 from its reverse (38931552), we obtain a square (13417569 = 3663²).

The spelling of 25513983 in words is "twenty-five million, five hundred thirteen thousand, nine hundred eighty-three".