5018447281 has 3 divisors (see below), whose sum is σ = 5018518123. Its totient is φ = 5018376440.

The previous prime is 5018447251. The next prime is 5018447299. The reversal of 5018447281 is 1827448105.

The square root of 5018447281 is 70841.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2421525681 + 2596921600 = 49209^2 + 50960^2 .

It is not a de Polignac number, because 5018447281 - 2⁷ = 5018447153 is a prime.

It is a super-2 number, since 2×5018447281² = 50369626224352585922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5018447251) 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 2 ways as a sum of consecutive naturals, for example, 35421 + ... + 106261.

Almost surely, 2^5018447281 is an apocalyptic number.

5018447281 is the 70841-st square number.

5018447281 is the 35421-st centered octagonal number.

It is an amenable number.

5018447281 is a deficient number, since it is larger than the sum of its proper divisors (70842).

5018447281 is an frugal number, since it uses more digits than its factorization.

5018447281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141682 (or 70841 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The cubic root of 5018447281 is about 1712.0763261574.

The spelling of 5018447281 in words is "five billion, eighteen million, four hundred forty-seven thousand, two hundred eighty-one".