216968312 has 32 divisors (see below), whose sum is σ = 444521520. Its totient is φ = 98461440.

The previous prime is 216968303. The next prime is 216968317. The reversal of 216968312 is 213869612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216968317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64988 + ... + 68244.

Almost surely, 2^216968312 is an apocalyptic number.

216968312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216968312 is an abundant number, since it is smaller than the sum of its proper divisors (227553208).

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

216968312 is a wasteful number, since it uses less digits than its factorization.

216968312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031 (or 4027 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 216968312 is about 14729.8442625847. The cubic root of 216968312 is about 600.8952487370.

The spelling of 216968312 in words is "two hundred sixteen million, nine hundred sixty-eight thousand, three hundred twelve".