25116321 has 8 divisors (see below), whose sum is σ = 33960384. Its totient is φ = 16508240.

The previous prime is 25116319. The next prime is 25116331. The reversal of 25116321 is 12361152.

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 25116321 - 2¹ = 25116319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25116331) 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, 58746 + ... + 59171.

It is an arithmetic number, because the mean of its divisors is an integer number (4245048).

Almost surely, 2^25116321 is an apocalyptic number.

It is an amenable number.

25116321 is a deficient number, since it is larger than the sum of its proper divisors (8844063).

25116321 is a wasteful number, since it uses less digits than its factorization.

25116321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117991.

The product of its digits is 360, while the sum is 21.

The square root of 25116321 is about 5011.6186008115. The cubic root of 25116321 is about 292.8545718366.

Adding to 25116321 its reverse (12361152), we get a palindrome (37477473).

The spelling of 25116321 in words is "twenty-five million, one hundred sixteen thousand, three hundred twenty-one".