5181157111 has 4 divisors (see below), whose sum is σ = 5579707672. Its totient is φ = 4782606552.

The previous prime is 5181157087. The next prime is 5181157141. The reversal of 5181157111 is 1117511815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5181157111 - 2⁹ = 5181156599 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 (5181157141) 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 3 ways as a sum of consecutive naturals, for example, 199275261 + ... + 199275286.

It is an arithmetic number, because the mean of its divisors is an integer number (1394926918).

Almost surely, 2^5181157111 is an apocalyptic number.

5181157111 is a deficient number, since it is larger than the sum of its proper divisors (398550561).

5181157111 is a wasteful number, since it uses less digits than its factorization.

5181157111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398550560.

The product of its digits is 1400, while the sum is 31.

The square root of 5181157111 is about 71980.2550078839. The cubic root of 5181157111 is about 1730.3830565007.

Adding to 5181157111 its reverse (1117511815), we get a palindrome (6298668926).

The spelling of 5181157111 in words is "five billion, one hundred eighty-one million, one hundred fifty-seven thousand, one hundred eleven".