5181916131 has 24 divisors (see below), whose sum is σ = 8556693600. Its totient is φ = 2960257536.

The previous prime is 5181916121. The next prime is 5181916163. The reversal of 5181916131 is 1316191815.

5181916131 is a `hidden beast` number, since 518 + 1 + 9 + 1 + 6 + 131 = 666.

It is not a de Polignac number, because 5181916131 - 2⁵ = 5181916099 is a prime.

It is a super-2 number, since 2×5181916131² = 53704509577436018322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5181916121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264531 + ... + 283443.

It is an arithmetic number, because the mean of its divisors is an integer number (356528900).

Almost surely, 2^5181916131 is an apocalyptic number.

5181916131 is a deficient number, since it is larger than the sum of its proper divisors (3374777469).

5181916131 is a wasteful number, since it uses less digits than its factorization.

5181916131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23275 (or 23272 counting only the distinct ones).

The product of its digits is 6480, while the sum is 36.

The square root of 5181916131 is about 71985.5272329098. The cubic root of 5181916131 is about 1730.4675505747.

The spelling of 5181916131 in words is "five billion, one hundred eighty-one million, nine hundred sixteen thousand, one hundred thirty-one".