5181731982 has 48 divisors (see below), whose sum is σ = 12852283392. Its totient is φ = 1478034000.

The previous prime is 5181731921. The next prime is 5181732089. The reversal of 5181731982 is 2891371815.

5181731982 is a `hidden beast` number, since 518 + 17 + 31 + 98 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42607 + ... + 110357.

It is an arithmetic number, because the mean of its divisors is an integer number (267755904).

Almost surely, 2^5181731982 is an apocalyptic number.

5181731982 is an abundant number, since it is smaller than the sum of its proper divisors (7670551410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5181731982 is a wasteful number, since it uses less digits than its factorization.

5181731982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68373 (or 68370 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 5181731982 is about 71984.2481519395. The cubic root of 5181731982 is about 1730.4470518740.

The spelling of 5181731982 in words is "five billion, one hundred eighty-one million, seven hundred thirty-one thousand, nine hundred eighty-two".