25231851319 has 4 divisors (see below), whose sum is σ = 25296715080. Its totient is φ = 25166987560.

The previous prime is 25231851251. The next prime is 25231851329. The reversal of 25231851319 is 91315813252.

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

It is a cyclic number.

It is not a de Polignac number, because 25231851319 - 2¹⁵ = 25231818551 is a prime.

It is a super-2 number, since 2×25231851319² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231851329) 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, 32431297 + ... + 32432074.

It is an arithmetic number, because the mean of its divisors is an integer number (6324178770).

Almost surely, 2^25231851319 is an apocalyptic number.

25231851319 is a deficient number, since it is larger than the sum of its proper divisors (64863761).

25231851319 is an equidigital number, since it uses as much as digits as its factorization.

25231851319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64863760.

The product of its digits is 64800, while the sum is 40.

The spelling of 25231851319 in words is "twenty-five billion, two hundred thirty-one million, eight hundred fifty-one thousand, three hundred nineteen".