2131166061 has 6 divisors (see below), whose sum is σ = 3078350990. Its totient is φ = 1420777368.

The previous prime is 2131166047. The next prime is 2131166069. The reversal of 2131166061 is 1606611312.

2131166061 is a `hidden beast` number, since 21 + 31 + 1 + 6 + 606 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1736388900 + 394777161 = 41670^2 + 19869^2 .

It is not a de Polignac number, because 2131166061 - 2⁵ = 2131166029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131166069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118398106 + ... + 118398123.

Almost surely, 2^2131166061 is an apocalyptic number.

It is an amenable number.

2131166061 is a deficient number, since it is larger than the sum of its proper divisors (947184929).

2131166061 is a wasteful number, since it uses less digits than its factorization.

2131166061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236796235 (or 236796232 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2131166061 is about 46164.5541622574. The cubic root of 2131166061 is about 1286.8830987615.

Adding to 2131166061 its reverse (1606611312), we get a palindrome (3737777373).

The spelling of 2131166061 in words is "two billion, one hundred thirty-one million, one hundred sixty-six thousand, sixty-one".