25152321 has 4 divisors (see below), whose sum is σ = 33536432. Its totient is φ = 16768212.

The previous prime is 25152319. The next prime is 25152329. The reversal of 25152321 is 12325152.

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 not a de Polignac number, because 25152321 - 2¹ = 25152319 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25152329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4192051 + ... + 4192056.

It is an arithmetic number, because the mean of its divisors is an integer number (8384108).

Almost surely, 2^25152321 is an apocalyptic number.

It is an amenable number.

25152321 is a deficient number, since it is larger than the sum of its proper divisors (8384111).

25152321 is an equidigital number, since it uses as much as digits as its factorization.

25152321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8384110.

The product of its digits is 600, while the sum is 21.

The square root of 25152321 is about 5015.2089687270. The cubic root of 25152321 is about 292.9944242126.

Adding to 25152321 its reverse (12325152), we get a palindrome (37477473).

The spelling of 25152321 in words is "twenty-five million, one hundred fifty-two thousand, three hundred twenty-one".