216922422 has 8 divisors (see below), whose sum is σ = 433844856. Its totient is φ = 72307472.

The previous prime is 216922421. The next prime is 216922423. The reversal of 216922422 is 224229612.

It is an interprime number because it is at equal distance from previous prime (216922421) and next prime (216922423).

It is a sphenic number, since it is the product of 3 distinct primes.

216922422 is an admirable number.

It is a super-4 number, since 4×216922422⁴ (a number of 34 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216922422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216922421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18076863 + ... + 18076874.

It is an arithmetic number, because the mean of its divisors is an integer number (54230607).

Almost surely, 2^216922422 is an apocalyptic number.

216922422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216922422 is a wasteful number, since it uses less digits than its factorization.

216922422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36153742.

The product of its digits is 6912, while the sum is 30.

The square root of 216922422 is about 14728.2864583766. The cubic root of 216922422 is about 600.8528815252.

The spelling of 216922422 in words is "two hundred sixteen million, nine hundred twenty-two thousand, four hundred twenty-two".