5181481261 has 8 divisors (see below), whose sum is σ = 5676787584. Its totient is φ = 4690218720.

The previous prime is 5181481219. The next prime is 5181481271. The reversal of 5181481261 is 1621841815.

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

It is not a de Polignac number, because 5181481261 - 2²⁹ = 4644610349 is a prime.

It is a super-3 number, since 3×5181481261³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5181481261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181481271) 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, 1008261 + ... + 1013386.

It is an arithmetic number, because the mean of its divisors is an integer number (709598448).

Almost surely, 2^5181481261 is an apocalyptic number.

It is an amenable number.

5181481261 is a deficient number, since it is larger than the sum of its proper divisors (495306323).

5181481261 is a wasteful number, since it uses less digits than its factorization.

5181481261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021891.

The product of its digits is 15360, while the sum is 37.

The square root of 5181481261 is about 71982.5066318199. The cubic root of 5181481261 is about 1730.4191418744.

The spelling of 5181481261 in words is "five billion, one hundred eighty-one million, four hundred eighty-one thousand, two hundred sixty-one".