25343250321 has 4 divisors (see below), whose sum is σ = 33791000432. Its totient is φ = 16895500212.

The previous prime is 25343250313. The next prime is 25343250347. The reversal of 25343250321 is 12305234352.

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 25343250321 - 2³ = 25343250313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25343250221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4223875051 + ... + 4223875056.

It is an arithmetic number, because the mean of its divisors is an integer number (8447750108).

Almost surely, 2^25343250321 is an apocalyptic number.

It is an amenable number.

25343250321 is a deficient number, since it is larger than the sum of its proper divisors (8447750111).

25343250321 is an equidigital number, since it uses as much as digits as its factorization.

25343250321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8447750110.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 25343250321 its reverse (12305234352), we get a palindrome (37648484673).

The spelling of 25343250321 in words is "twenty-five billion, three hundred forty-three million, two hundred fifty thousand, three hundred twenty-one".