5218120581 has 8 divisors (see below), whose sum is σ = 6958037760. Its totient is φ = 3478475232.

The previous prime is 5218120571. The next prime is 5218120591. The reversal of 5218120581 is 1850218125.

It is an interprime number because it is at equal distance from previous prime (5218120571) and next prime (5218120591).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5218120581 - 2⁶ = 5218120517 is a prime.

It is a super-2 number, since 2×5218120581² = 54457564795711555122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218120571) 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, 17896 + ... + 103713.

It is an arithmetic number, because the mean of its divisors is an integer number (869754720).

Almost surely, 2^5218120581 is an apocalyptic number.

It is an amenable number.

5218120581 is a deficient number, since it is larger than the sum of its proper divisors (1739917179).

5218120581 is a wasteful number, since it uses less digits than its factorization.

5218120581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135915.

The product of its (nonzero) digits is 6400, while the sum is 33.

The square root of 5218120581 is about 72236.5598641021. The cubic root of 5218120581 is about 1734.4882822356.

The spelling of 5218120581 in words is "five billion, two hundred eighteen million, one hundred twenty thousand, five hundred eighty-one".