216051222 has 32 divisors (see below), whose sum is σ = 444092544. Its totient is φ = 70030400.

The previous prime is 216051217. The next prime is 216051229. The reversal of 216051222 is 222150612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216051229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 84097 + ... + 86627.

It is an arithmetic number, because the mean of its divisors is an integer number (13877892).

Almost surely, 2^216051222 is an apocalyptic number.

216051222 is an abundant number, since it is smaller than the sum of its proper divisors (228041322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216051222 is a wasteful number, since it uses less digits than its factorization.

216051222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 216051222 is about 14698.6809612291. The cubic root of 216051222 is about 600.0474240293.

The spelling of 216051222 in words is "two hundred sixteen million, fifty-one thousand, two hundred twenty-two".