222721275464165 has 16 divisors (see below), whose sum is σ = 272378442136176. Its totient is φ = 174770145139200.

The previous prime is 222721275464161. The next prime is 222721275464189. The reversal of 222721275464165 is 561464572127222.

It can be written as a sum of positive squares in 8 ways, for example, as 13146258853729 + 209575016610436 = 3625777^2 + 14476706^2 .

It is not a de Polignac number, because 222721275464165 - 2² = 222721275464161 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 222721275464165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222721275464161) 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 15 ways as a sum of consecutive naturals, for example, 107250026 + ... + 109306955.

It is an arithmetic number, because the mean of its divisors is an integer number (17023652633511).

Almost surely, 2^{222721275464165} is an apocalyptic number.

It is an amenable number.

222721275464165 is a deficient number, since it is larger than the sum of its proper divisors (49657166672011).

222721275464165 is a wasteful number, since it uses less digits than its factorization.

222721275464165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216560920.

The product of its digits is 22579200, while the sum is 56.

The spelling of 222721275464165 in words is "two hundred twenty-two trillion, seven hundred twenty-one billion, two hundred seventy-five million, four hundred sixty-four thousand, one hundred sixty-five".