212216516 has 12 divisors (see below), whose sum is σ = 372035580. Its totient is φ = 105920640.

The previous prime is 212216509. The next prime is 212216597. The reversal of 212216516 is 615612212.

It can be written as a sum of positive squares in 2 ways, for example, as 97812100 + 114404416 = 9890^2 + 10696^2 .

It is a super-3 number, since 3×212216516³ (a number of 26 digits) contains 333 as substring.

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, 44345 + ... + 48896.

It is an arithmetic number, because the mean of its divisors is an integer number (31002965).

Almost surely, 2^212216516 is an apocalyptic number.

It is an amenable number.

212216516 is a deficient number, since it is larger than the sum of its proper divisors (159819064).

212216516 is a wasteful number, since it uses less digits than its factorization.

212216516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93814 (or 93812 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 212216516 is about 14567.6530711024. The cubic root of 212216516 is about 596.4761183549.

Adding to 212216516 its reverse (615612212), we get a palindrome (827828728).

The spelling of 212216516 in words is "two hundred twelve million, two hundred sixteen thousand, five hundred sixteen".