216906822 has 40 divisors (see below), whose sum is σ = 530221032. Its totient is φ = 65728800.

The previous prime is 216906821. The next prime is 216906847. The reversal of 216906822 is 228609612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216906821) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59079 + ... + 62642.

Almost surely, 2^216906822 is an apocalyptic number.

216906822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

216906822 is an abundant number, since it is smaller than the sum of its proper divisors (313314210).

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

216906822 is a wasteful number, since it uses less digits than its factorization.

216906822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121746 (or 121737 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 216906822 is about 14727.7568556790. The cubic root of 216906822 is about 600.8384777127.

The spelling of 216906822 in words is "two hundred sixteen million, nine hundred six thousand, eight hundred twenty-two".