6881131 has 2 divisors, whose sum is σ = 6881132. Its totient is φ = 6881130.

The previous prime is 6881123. The next prime is 6881167. The reversal of 6881131 is 1311886.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6881131 - 2³ = 6881123 is a prime.

It is a super-2 number, since 2×6881131² = 94699927678322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6881131.

It is not a weakly prime, because it can be changed into another prime (6881191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3440565 + 3440566.

It is an arithmetic number, because the mean of its divisors is an integer number (3440566).

Almost surely, 2^6881131 is an apocalyptic number.

6881131 is the 1515-th hex number.

6881131 is a deficient number, since it is larger than the sum of its proper divisors (1).

6881131 is an equidigital number, since it uses as much as digits as its factorization.

6881131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 28.

The square root of 6881131 is about 2623.1909957150. The cubic root of 6881131 is about 190.2041296419.

It can be divided in two parts, 688 and 1131, that multiplied together give a triangular number (778128 = T₁₂₄₇).

The spelling of 6881131 in words is "six million, eight hundred eighty-one thousand, one hundred thirty-one".