25231611 has 4 divisors (see below), whose sum is σ = 33642152. Its totient is φ = 16821072.

The previous prime is 25231603. The next prime is 25231631. The reversal of 25231611 is 11613252.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25231611 - 2³ = 25231603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25231631) 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, 4205266 + ... + 4205271.

It is an arithmetic number, because the mean of its divisors is an integer number (8410538).

Almost surely, 2^25231611 is an apocalyptic number.

25231611 is a deficient number, since it is larger than the sum of its proper divisors (8410541).

25231611 is an equidigital number, since it uses as much as digits as its factorization.

25231611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410540.

The product of its digits is 360, while the sum is 21.

The square root of 25231611 is about 5023.1077034043. The cubic root of 25231611 is about 293.3019791154.

Adding to 25231611 its reverse (11613252), we get a palindrome (36844863).

The spelling of 25231611 in words is "twenty-five million, two hundred thirty-one thousand, six hundred eleven".