212116403 has 4 divisors (see below), whose sum is σ = 212373720. Its totient is φ = 211859088.

The previous prime is 212116397. The next prime is 212116423. The reversal of 212116403 is 304611212.

212116403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212116403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212116423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127418 + ... + 129071.

It is an arithmetic number, because the mean of its divisors is an integer number (53093430).

Almost surely, 2^212116403 is an apocalyptic number.

212116403 is a deficient number, since it is larger than the sum of its proper divisors (257317).

212116403 is an equidigital number, since it uses as much as digits as its factorization.

212116403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257316.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 212116403 is about 14564.2165254434. The cubic root of 212116403 is about 596.3823078646.

Adding to 212116403 its reverse (304611212), we get a palindrome (516727615).

The spelling of 212116403 in words is "two hundred twelve million, one hundred sixteen thousand, four hundred three".