5531162221 has 4 divisors (see below), whose sum is σ = 5956636252. Its totient is φ = 5105688192.

The previous prime is 5531162207. The next prime is 5531162233. The reversal of 5531162221 is 1222611355.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 293745321 + 5237416900 = 17139^2 + 72370^2 .

It is a cyclic number.

It is not a de Polignac number, because 5531162221 - 2⁷ = 5531162093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5531162221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5531162201) 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, 212736996 + ... + 212737021.

It is an arithmetic number, because the mean of its divisors is an integer number (1489159063).

Almost surely, 2^5531162221 is an apocalyptic number.

It is an amenable number.

5531162221 is a deficient number, since it is larger than the sum of its proper divisors (425474031).

5531162221 is a wasteful number, since it uses less digits than its factorization.

5531162221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425474030.

The product of its digits is 3600, while the sum is 28.

The square root of 5531162221 is about 74371.7837691150. The cubic root of 5531162221 is about 1768.5016335101.

Adding to 5531162221 its reverse (1222611355), we get a palindrome (6753773576).

The spelling of 5531162221 in words is "five billion, five hundred thirty-one million, one hundred sixty-two thousand, two hundred twenty-one".