25390231 has 8 divisors (see below), whose sum is σ = 26966304. Its totient is φ = 23823360.

The previous prime is 25390223. The next prime is 25390249. The reversal of 25390231 is 13209352.

It is a happy number.

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 25390231 - 2³ = 25390223 is a prime.

It is a super-2 number, since 2×25390231² = 1289327660466722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25390196 and 25390205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25390201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3886 + ... + 8116.

It is an arithmetic number, because the mean of its divisors is an integer number (3370788).

Almost surely, 2^25390231 is an apocalyptic number.

25390231 is a deficient number, since it is larger than the sum of its proper divisors (1576073).

25390231 is a wasteful number, since it uses less digits than its factorization.

25390231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 25390231 is about 5038.8719967866. The cubic root of 25390231 is about 293.9153156686.

Adding to 25390231 its reverse (13209352), we get a palindrome (38599583).

The spelling of 25390231 in words is "twenty-five million, three hundred ninety thousand, two hundred thirty-one".