25072231 has 4 divisors (see below), whose sum is σ = 26162352. Its totient is φ = 23982112.

The previous prime is 25072219. The next prime is 25072253. The reversal of 25072231 is 13227052.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25072231 is a prime.

It is a super-2 number, since 2×25072231² = 1257233534634722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25072261) 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, 545026 + ... + 545071.

It is an arithmetic number, because the mean of its divisors is an integer number (6540588).

Almost surely, 2^25072231 is an apocalyptic number.

25072231 is a deficient number, since it is larger than the sum of its proper divisors (1090121).

25072231 is a wasteful number, since it uses less digits than its factorization.

25072231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090120.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 25072231 is about 5007.2178902061. The cubic root of 25072231 is about 292.6831093467.

Adding to 25072231 its reverse (13227052), we get a palindrome (38299283).

The spelling of 25072231 in words is "twenty-five million, seventy-two thousand, two hundred thirty-one".