216321942 has 8 divisors (see below), whose sum is σ = 432643896. Its totient is φ = 72107312.

The previous prime is 216321913. The next prime is 216321961. The reversal of 216321942 is 249123612.

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

216321942 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18026823 + ... + 18026834.

It is an arithmetic number, because the mean of its divisors is an integer number (54080487).

Almost surely, 2^216321942 is an apocalyptic number.

216321942 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.

216321942 is a wasteful number, since it uses less digits than its factorization.

216321942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36053662.

The product of its digits is 5184, while the sum is 30.

The square root of 216321942 is about 14707.8870678286. The cubic root of 216321942 is about 600.2979464665.

The spelling of 216321942 in words is "two hundred sixteen million, three hundred twenty-one thousand, nine hundred forty-two".