216853722 has 12 divisors (see below), whose sum is σ = 469849770. Its totient is φ = 72284568.

The previous prime is 216853639. The next prime is 216853739. The reversal of 216853722 is 227358612.

It can be written as a sum of positive squares in only one way, i.e., 201100761 + 15752961 = 14181^2 + 3969^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6023697 + ... + 6023732.

Almost surely, 2^216853722 is an apocalyptic number.

216853722 is an abundant number, since it is smaller than the sum of its proper divisors (252996048).

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

216853722 is a wasteful number, since it uses less digits than its factorization.

216853722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12047437 (or 12047434 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 216853722 is about 14725.9540268195. The cubic root of 216853722 is about 600.7894441743.

The spelling of 216853722 in words is "two hundred sixteen million, eight hundred fifty-three thousand, seven hundred twenty-two".