6311320445431 has 4 divisors (see below), whose sum is σ = 6351519938872. Its totient is φ = 6271120951992.

The previous prime is 6311320445429. The next prime is 6311320445447. The reversal of 6311320445431 is 1345440231136.

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 6311320445431 - 2¹ = 6311320445429 is a prime.

It is a super-2 number, since 2×6311320445431² (a number of 26 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 (6311320445831) 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, 20099746485 + ... + 20099746798.

It is an arithmetic number, because the mean of its divisors is an integer number (1587879984718).

Almost surely, 2^{6311320445431} is an apocalyptic number.

6311320445431 is a deficient number, since it is larger than the sum of its proper divisors (40199493441).

6311320445431 is a wasteful number, since it uses less digits than its factorization.

6311320445431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40199493440.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 6311320445431 its reverse (1345440231136), we get a palindrome (7656760676567).

The spelling of 6311320445431 in words is "six trillion, three hundred eleven billion, three hundred twenty million, four hundred forty-five thousand, four hundred thirty-one".