216147312 has 40 divisors (see below), whose sum is σ = 620424080. Its totient is φ = 72048960.

The previous prime is 216147311. The next prime is 216147317. The reversal of 216147312 is 213741612.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216147311) 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, 249739 + ... + 250602.

It is an arithmetic number, because the mean of its divisors is an integer number (15510602).

Almost surely, 2^216147312 is an apocalyptic number.

It is an amenable number.

216147312 is an abundant number, since it is smaller than the sum of its proper divisors (404276768).

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

216147312 is a wasteful number, since it uses less digits than its factorization.

216147312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500358 (or 500346 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 216147312 is about 14701.9492585167. The cubic root of 216147312 is about 600.1363690035.

Adding to 216147312 its reverse (213741612), we get a palindrome (429888924).

The spelling of 216147312 in words is "two hundred sixteen million, one hundred forty-seven thousand, three hundred twelve".