25231211 has 4 divisors (see below), whose sum is σ = 25462800. Its totient is φ = 24999624.

The previous prime is 25231201. The next prime is 25231223. The reversal of 25231211 is 11213252.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25231211 - 2⁶ = 25231147 is a prime.

It is a super-2 number, since 2×25231211² = 1273228017053042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25231211.

It is not an unprimeable number, because it can be changed into a prime (25231201) 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, 115631 + ... + 115848.

It is an arithmetic number, because the mean of its divisors is an integer number (6365700).

Almost surely, 2^25231211 is an apocalyptic number.

25231211 is a deficient number, since it is larger than the sum of its proper divisors (231589).

25231211 is a wasteful number, since it uses less digits than its factorization.

25231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231588.

The product of its digits is 120, while the sum is 17.

The square root of 25231211 is about 5023.0678872577. The cubic root of 25231211 is about 293.3004291891.

Adding to 25231211 its reverse (11213252), we get a palindrome (36444463).

The spelling of 25231211 in words is "twenty-five million, two hundred thirty-one thousand, two hundred eleven".