25315721323 has 8 divisors (see below), whose sum is σ = 25619695200. Its totient is φ = 25012181568.

The previous prime is 25315721317. The next prime is 25315721339. The reversal of 25315721323 is 32312751352.

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 25315721323 - 2⁹ = 25315720811 is a prime.

It is a super-2 number, since 2×25315721323² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25315721023) 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 7 ways as a sum of consecutive naturals, for example, 9565 + ... + 225217.

It is an arithmetic number, because the mean of its divisors is an integer number (3202461900).

Almost surely, 2^25315721323 is an apocalyptic number.

25315721323 is a deficient number, since it is larger than the sum of its proper divisors (303973877).

25315721323 is a wasteful number, since it uses less digits than its factorization.

25315721323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217061.

The product of its digits is 37800, while the sum is 34.

The spelling of 25315721323 in words is "twenty-five billion, three hundred fifteen million, seven hundred twenty-one thousand, three hundred twenty-three".