25135131 has 8 divisors (see below), whose sum is σ = 38301184. Its totient is φ = 14362920.

The previous prime is 25135127. The next prime is 25135133. The reversal of 25135131 is 13153152.

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

It is not a de Polignac number, because 25135131 - 2² = 25135127 is a prime.

It is a super-2 number, since 2×25135131² = 1263549620774322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1196911 = 25135131 / (2 + 5 + 1 + 3 + 5 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25135098 and 25135107.

It is not an unprimeable number, because it can be changed into a prime (25135133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598435 + ... + 598476.

It is an arithmetic number, because the mean of its divisors is an integer number (4787648).

Almost surely, 2^25135131 is an apocalyptic number.

25135131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25135131 is a deficient number, since it is larger than the sum of its proper divisors (13166053).

25135131 is a wasteful number, since it uses less digits than its factorization.

25135131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196921.

The product of its digits is 450, while the sum is 21.

The square root of 25135131 is about 5013.4948887976. The cubic root of 25135131 is about 292.9276613615.

25135131 divided by its sum of digits (21) gives a palindrome (1196911).

Adding to 25135131 its reverse (13153152), we get a palindrome (38288283).

The spelling of 25135131 in words is "twenty-five million, one hundred thirty-five thousand, one hundred thirty-one".