72211105 has 4 divisors (see below), whose sum is σ = 86653332. Its totient is φ = 57768880.

The previous prime is 72211093. The next prime is 72211123. The reversal of 72211105 is 50111227.

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 41563809 + 30647296 = 6447^2 + 5536^2 .

It is not a de Polignac number, because 72211105 - 2²³ = 63822497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7221106 + ... + 7221115.

It is an arithmetic number, because the mean of its divisors is an integer number (21663333).

Almost surely, 2^72211105 is an apocalyptic number.

It is an amenable number.

72211105 is a deficient number, since it is larger than the sum of its proper divisors (14442227).

72211105 is a wasteful number, since it uses less digits than its factorization.

72211105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14442226.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 72211105 is about 8497.7117508186. The cubic root of 72211105 is about 416.4229568588.

The spelling of 72211105 in words is "seventy-two million, two hundred eleven thousand, one hundred five".