25690231 has 8 divisors (see below), whose sum is σ = 30076704. Its totient is φ = 21482880.

The previous prime is 25690229. The next prime is 25690277. The reversal of 25690231 is 13209652.

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

It is a cyclic number.

It is not a de Polignac number, because 25690231 - 2¹ = 25690229 is a prime.

It is a super-2 number, since 2×25690231² = 1319975937666722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25690231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25690331) 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, 44470 + ... + 45043.

It is an arithmetic number, because the mean of its divisors is an integer number (3759588).

Almost surely, 2^25690231 is an apocalyptic number.

25690231 is a deficient number, since it is larger than the sum of its proper divisors (4386473).

25690231 is an equidigital number, since it uses as much as digits as its factorization.

25690231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89561.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 25690231 is about 5068.5531466090. The cubic root of 25690231 is about 295.0683782889.

Adding to 25690231 its reverse (13209652), we get a palindrome (38899883).

It can be divided in two parts, 25690 and 231, that added together give a square (25921 = 161²).

The spelling of 25690231 in words is "twenty-five million, six hundred ninety thousand, two hundred thirty-one".