5621281181 has 4 divisors (see below), whose sum is σ = 5802612864. Its totient is φ = 5439949500.

The previous prime is 5621281151. The next prime is 5621281187. The reversal of 5621281181 is 1811821265.

5621281181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5621281181 - 2⁶ = 5621281117 is a prime.

It is a super-2 number, since 2×5621281181² = 63197604231729509522, 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 (5621281187) 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 3 ways as a sum of consecutive naturals, for example, 90665795 + ... + 90665856.

It is an arithmetic number, because the mean of its divisors is an integer number (1450653216).

Almost surely, 2^5621281181 is an apocalyptic number.

It is an amenable number.

5621281181 is a deficient number, since it is larger than the sum of its proper divisors (181331683).

5621281181 is a wasteful number, since it uses less digits than its factorization.

5621281181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181331682.

The product of its digits is 7680, while the sum is 35.

The square root of 5621281181 is about 74975.2037743146. The cubic root of 5621281181 is about 1778.0546416239.

The spelling of 5621281181 in words is "five billion, six hundred twenty-one million, two hundred eighty-one thousand, one hundred eighty-one".