6311320231 has 4 divisors (see below), whose sum is σ = 6643495000. Its totient is φ = 5979145464.

The previous prime is 6311320217. The next prime is 6311320241. The reversal of 6311320231 is 1320231136.

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 6311320231 - 2⁹ = 6311319719 is a prime.

It is a super-2 number, since 2×6311320231² = 79665526116459786722, 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 (6311320241) 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, 166087356 + ... + 166087393.

It is an arithmetic number, because the mean of its divisors is an integer number (1660873750).

Almost surely, 2^6311320231 is an apocalyptic number.

6311320231 is a deficient number, since it is larger than the sum of its proper divisors (332174769).

6311320231 is a wasteful number, since it uses less digits than its factorization.

6311320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332174768.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 6311320231 is about 79443.8180791936. The cubic root of 6311320231 is about 1848.0203055519.

Adding to 6311320231 its reverse (1320231136), we get a palindrome (7631551367).

The spelling of 6311320231 in words is "six billion, three hundred eleven million, three hundred twenty thousand, two hundred thirty-one".