5521381811 has 32 divisors (see below), whose sum is σ = 6249830400. Its totient is φ = 4835376000.

The previous prime is 5521381807. The next prime is 5521381813. The reversal of 5521381811 is 1181831255.

It is a cyclic number.

It is not a de Polignac number, because 5521381811 - 2² = 5521381807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5521381813) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6724781 + ... + 6725601.

It is an arithmetic number, because the mean of its divisors is an integer number (195307200).

Almost surely, 2^5521381811 is an apocalyptic number.

5521381811 is a deficient number, since it is larger than the sum of its proper divisors (728448589).

5521381811 is a wasteful number, since it uses less digits than its factorization.

5521381811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its digits is 9600, while the sum is 35.

The square root of 5521381811 is about 74306.0011775630. The cubic root of 5521381811 is about 1767.4586413822.

The spelling of 5521381811 in words is "five billion, five hundred twenty-one million, three hundred eighty-one thousand, eight hundred eleven".