25311315343 has 4 divisors (see below), whose sum is σ = 25547869800. Its totient is φ = 25074760888.

The previous prime is 25311315319. The next prime is 25311315347. The reversal of 25311315343 is 34351311352.

It is a happy number.

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 25311315343 - 2²¹ = 25309218191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25311315347) 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, 118277068 + ... + 118277281.

It is an arithmetic number, because the mean of its divisors is an integer number (6386967450).

Almost surely, 2^25311315343 is an apocalyptic number.

25311315343 is a deficient number, since it is larger than the sum of its proper divisors (236554457).

25311315343 is a wasteful number, since it uses less digits than its factorization.

25311315343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236554456.

The product of its digits is 16200, while the sum is 31.

Adding to 25311315343 its reverse (34351311352), we get a palindrome (59662626695).

The spelling of 25311315343 in words is "twenty-five billion, three hundred eleven million, three hundred fifteen thousand, three hundred forty-three".