25613138 has 8 divisors (see below), whose sum is σ = 38476620. Its totient is φ = 12787600.

The previous prime is 25613131. The next prime is 25613149. The reversal of 25613138 is 83131652.

It can be written as a sum of positive squares in 2 ways, for example, as 23107249 + 2505889 = 4807^2 + 1583^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25613138.

It is not an unprimeable number, because it can be changed into a prime (25613131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7733 + ... + 10536.

Almost surely, 2^25613138 is an apocalyptic number.

25613138 is a deficient number, since it is larger than the sum of its proper divisors (12863482).

25613138 is a wasteful number, since it uses less digits than its factorization.

25613138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18972.

The product of its digits is 4320, while the sum is 29.

The square root of 25613138 is about 5060.9424023595. The cubic root of 25613138 is about 294.7729287750.

The spelling of 25613138 in words is "twenty-five million, six hundred thirteen thousand, one hundred thirty-eight".