216871692 has 48 divisors (see below), whose sum is σ = 531928320. Its totient is φ = 68637888.

The previous prime is 216871637. The next prime is 216871693. The reversal of 216871692 is 296178612.

216871692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (216871693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35538 + ... + 41190.

It is an arithmetic number, because the mean of its divisors is an integer number (11081840).

Almost surely, 2^216871692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216871692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265964160).

216871692 is an abundant number, since it is smaller than the sum of its proper divisors (315056628).

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

216871692 is a wasteful number, since it uses less digits than its factorization.

216871692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822 (or 5820 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 216871692 is about 14726.5641614057. The cubic root of 216871692 is about 600.8060389061.

The spelling of 216871692 in words is "two hundred sixteen million, eight hundred seventy-one thousand, six hundred ninety-two".