5181306730 has 16 divisors (see below), whose sum is σ = 9329884200. Its totient is φ = 2071737792.

The previous prime is 5181306703. The next prime is 5181306731. The reversal of 5181306730 is 376031815.

It can be written as a sum of positive squares in 4 ways, for example, as 3489383041 + 1691923689 = 59071^2 + 41133^2 .

It is not an unprimeable number, because it can be changed into a prime (5181306731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70005 + ... + 123544.

Almost surely, 2^5181306730 is an apocalyptic number.

5181306730 is a deficient number, since it is larger than the sum of its proper divisors (4148577470).

5181306730 is a wasteful number, since it uses less digits than its factorization.

5181306730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196233.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 5181306730 is about 71981.2943062293. The cubic root of 5181306730 is about 1730.3997127344.

The spelling of 5181306730 in words is "five billion, one hundred eighty-one million, three hundred six thousand, seven hundred thirty".