55722222217 has 4 divisors (see below), whose sum is σ = 55734285316. Its totient is φ = 55710159120.

The previous prime is 55722222211. The next prime is 55722222221. The reversal of 55722222217 is 71222222755.

55722222217 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 13652520336 + 42069701881 = 116844^2 + 205109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55722222217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55722222211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6024618 + ... + 6033859.

It is an arithmetic number, because the mean of its divisors is an integer number (13933571329).

Almost surely, 2^55722222217 is an apocalyptic number.

It is an amenable number.

55722222217 is a deficient number, since it is larger than the sum of its proper divisors (12063099).

55722222217 is a wasteful number, since it uses less digits than its factorization.

55722222217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12063098.

The product of its digits is 78400, while the sum is 37.

The spelling of 55722222217 in words is "fifty-five billion, seven hundred twenty-two million, two hundred twenty-two thousand, two hundred seventeen".