5524216781 has 4 divisors (see below), whose sum is σ = 5529385500. Its totient is φ = 5519048064.

The previous prime is 5524216697. The next prime is 5524216823. The reversal of 5524216781 is 1876124255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1876124255 = 5 ⋅375224851.

It can be written as a sum of positive squares in 2 ways, for example, as 1844702500 + 3679514281 = 42950^2 + 60659^2 .

It is a cyclic number.

It is not a de Polignac number, because 5524216781 - 2¹⁸ = 5523954637 is a prime.

It is a super-2 number, since 2×5524216781² = 61033942086964003922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5524216681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582756 + ... + 2584893.

It is an arithmetic number, because the mean of its divisors is an integer number (1382346375).

Almost surely, 2^5524216781 is an apocalyptic number.

It is an amenable number.

5524216781 is a deficient number, since it is larger than the sum of its proper divisors (5168719).

5524216781 is a wasteful number, since it uses less digits than its factorization.

5524216781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168718.

The product of its digits is 134400, while the sum is 41.

The square root of 5524216781 is about 74325.0750487344. The cubic root of 5524216781 is about 1767.7610919315.

The spelling of 5524216781 in words is "five billion, five hundred twenty-four million, two hundred sixteen thousand, seven hundred eighty-one".