25513138 has 8 divisors (see below), whose sum is σ = 43736832. Its totient is φ = 10934196.

The previous prime is 25513109. The next prime is 25513199. The reversal of 25513138 is 83131552.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 911170 + ... + 911197.

It is an arithmetic number, because the mean of its divisors is an integer number (5467104).

Almost surely, 2^25513138 is an apocalyptic number.

25513138 is a deficient number, since it is larger than the sum of its proper divisors (18223694).

25513138 is a wasteful number, since it uses less digits than its factorization.

25513138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822376.

The product of its digits is 3600, while the sum is 28.

The square root of 25513138 is about 5051.0531575108. The cubic root of 25513138 is about 294.3888063959.

It can be divided in two parts, 25513 and 138, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 25513138 in words is "twenty-five million, five hundred thirteen thousand, one hundred thirty-eight".