2166641131 has 2 divisors, whose sum is σ = 2166641132. Its totient is φ = 2166641130.

The previous prime is 2166641107. The next prime is 2166641171. The reversal of 2166641131 is 1311466612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2166641131 - 2²⁷ = 2032423403 is a prime.

It is a super-2 number, since 2×2166641131² = 9388667581081918322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2166641093 and 2166641102.

It is not a weakly prime, because it can be changed into another prime (2166641171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083320565 + 1083320566.

It is an arithmetic number, because the mean of its divisors is an integer number (1083320566).

Almost surely, 2^2166641131 is an apocalyptic number.

2166641131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166641131 is an equidigital number, since it uses as much as digits as its factorization.

2166641131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 2166641131 is about 46547.1925146942. The cubic root of 2166641131 is about 1293.9842625693.

The spelling of 2166641131 in words is "two billion, one hundred sixty-six million, six hundred forty-one thousand, one hundred thirty-one".