25316321 has 8 divisors (see below), whose sum is σ = 25683840. Its totient is φ = 24951168.

The previous prime is 25316309. The next prime is 25316323. The reversal of 25316321 is 12361352.

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 25316321 - 2¹⁸ = 25054177 is a prime.

It is a super-2 number, since 2×25316321² = 1281832217950082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25316323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34460 + ... + 35186.

It is an arithmetic number, because the mean of its divisors is an integer number (3210480).

Almost surely, 2^25316321 is an apocalyptic number.

It is an amenable number.

25316321 is a deficient number, since it is larger than the sum of its proper divisors (367519).

25316321 is an equidigital number, since it uses as much as digits as its factorization.

25316321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183.

The product of its digits is 1080, while the sum is 23.

The square root of 25316321 is about 5031.5326690781. The cubic root of 25316321 is about 293.6298463782.

Adding to 25316321 its reverse (12361352), we get a palindrome (37677673).

The spelling of 25316321 in words is "twenty-five million, three hundred sixteen thousand, three hundred twenty-one".