25331321 has 4 divisors (see below), whose sum is σ = 25357200. Its totient is φ = 25305444.

The previous prime is 25331263. The next prime is 25331329. The reversal of 25331321 is 12313352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25331321 - 2¹⁴ = 25314937 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 25331293 and 25331302.

It is not an unprimeable number, because it can be changed into a prime (25331329) 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 3 ways as a sum of consecutive naturals, for example, 11411 + ... + 13448.

It is an arithmetic number, because the mean of its divisors is an integer number (6339300).

Almost surely, 2^25331321 is an apocalyptic number.

It is an amenable number.

25331321 is a deficient number, since it is larger than the sum of its proper divisors (25879).

25331321 is a wasteful number, since it uses less digits than its factorization.

25331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25878.

The product of its digits is 540, while the sum is 20.

The square root of 25331321 is about 5033.0230478312. The cubic root of 25331321 is about 293.6878271316.

Adding to 25331321 its reverse (12313352), we get a palindrome (37644673).

It can be divided in two parts, 25331 and 321, that added together give a palindrome (25652).

The spelling of 25331321 in words is "twenty-five million, three hundred thirty-one thousand, three hundred twenty-one".