6720313131 has 12 divisors (see below), whose sum is σ = 11093850352. Its totient is φ = 3840178896.

The previous prime is 6720313123. The next prime is 6720313169. The reversal of 6720313131 is 1313130276.

It is not a de Polignac number, because 6720313131 - 2³ = 6720313123 is a prime.

It is a super-2 number, since 2×6720313131² = 90325217157382046322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6720313095 and 6720313104.

It is not an unprimeable number, because it can be changed into a prime (6720313181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53335756 + ... + 53335881.

Almost surely, 2^6720313131 is an apocalyptic number.

6720313131 is a deficient number, since it is larger than the sum of its proper divisors (4373537221).

6720313131 is a wasteful number, since it uses less digits than its factorization.

6720313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106671650 (or 106671647 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 6720313131 is about 81977.5160089643. The cubic root of 6720313131 is about 1887.1069023109.

The spelling of 6720313131 in words is "six billion, seven hundred twenty million, three hundred thirteen thousand, one hundred thirty-one".