2525231321 has 4 divisors (see below), whose sum is σ = 2525413044. Its totient is φ = 2525049600.

The previous prime is 2525231311. The next prime is 2525231339. The reversal of 2525231321 is 1231325252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1800814096 + 724417225 = 42436^2 + 26915^2 .

It is a cyclic number.

It is not a de Polignac number, because 2525231321 - 2¹⁸ = 2524969177 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 (2525231311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68120 + ... + 98441.

It is an arithmetic number, because the mean of its divisors is an integer number (631353261).

Almost surely, 2^2525231321 is an apocalyptic number.

It is an amenable number.

2525231321 is a deficient number, since it is larger than the sum of its proper divisors (181723).

2525231321 is a wasteful number, since it uses less digits than its factorization.

2525231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181722.

The product of its digits is 3600, while the sum is 26.

The square root of 2525231321 is about 50251.6797828690. The cubic root of 2525231321 is about 1361.7594228721.

Adding to 2525231321 its reverse (1231325252), we get a palindrome (3756556573).

The spelling of 2525231321 in words is "two billion, five hundred twenty-five million, two hundred thirty-one thousand, three hundred twenty-one".