216351222 has 16 divisors (see below), whose sum is σ = 435862512. Its totient is φ = 71590400.

The previous prime is 216351209. The next prime is 216351251. The reversal of 216351222 is 222153612.

It is a junction number, because it is equal to n+sod(n) for n = 216351192 and 216351201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130779 + ... + 132422.

It is an arithmetic number, because the mean of its divisors is an integer number (27241407).

Almost surely, 2^216351222 is an apocalyptic number.

216351222 is an abundant number, since it is smaller than the sum of its proper divisors (219511290).

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

216351222 is a wasteful number, since it uses less digits than its factorization.

216351222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263343.

The product of its digits is 1440, while the sum is 24.

The square root of 216351222 is about 14708.8824184572. The cubic root of 216351222 is about 600.3250294502.

The spelling of 216351222 in words is "two hundred sixteen million, three hundred fifty-one thousand, two hundred twenty-two".