5181481 has 6 divisors (see below), whose sum is σ = 5504510. Its totient is φ = 4876416.

The previous prime is 5181469. The next prime is 5181497. The reversal of 5181481 is 1841815.

It can be written as a sum of positive squares in 3 ways, for example, as 2223081 + 2958400 = 1491^2 + 1720^2 .

It is not a de Polignac number, because 5181481 - 2⁷ = 5181353 is a prime.

It is a super-3 number, since 3×5181481³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

5181481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5181431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8676 + ... + 9253.

Almost surely, 2^5181481 is an apocalyptic number.

It is an amenable number.

5181481 is a deficient number, since it is larger than the sum of its proper divisors (323029).

5181481 is a wasteful number, since it uses less digits than its factorization.

5181481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17963 (or 17946 counting only the distinct ones).

The product of its digits is 1280, while the sum is 28.

The square root of 5181481 is about 2276.2866691171. The cubic root of 5181481 is about 173.0419112820.

The spelling of 5181481 in words is "five million, one hundred eighty-one thousand, four hundred eighty-one".