6816252431 has 4 divisors (see below), whose sum is σ = 6842775072. Its totient is φ = 6789729792.

The previous prime is 6816252427. The next prime is 6816252463. The reversal of 6816252431 is 1342526186.

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 6816252431 - 2² = 6816252427 is a prime.

It is a super-2 number, since 2×6816252431² = 92922594406226819522, which 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 (6816255431) 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, 13260935 + ... + 13261448.

It is an arithmetic number, because the mean of its divisors is an integer number (1710693768).

Almost surely, 2^6816252431 is an apocalyptic number.

6816252431 is a deficient number, since it is larger than the sum of its proper divisors (26522641).

6816252431 is a wasteful number, since it uses less digits than its factorization.

6816252431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26522640.

The product of its digits is 69120, while the sum is 38.

The square root of 6816252431 is about 82560.5985382858. The cubic root of 6816252431 is about 1896.0446275666.

The spelling of 6816252431 in words is "six billion, eight hundred sixteen million, two hundred fifty-two thousand, four hundred thirty-one".