216265305212 has 36 divisors (see below), whose sum is σ = 416093654760. Its totient is φ = 98279792160.

The previous prime is 216265305209. The next prime is 216265305233. The reversal of 216265305212 is 212503562612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2151614 + ... + 2249882.

Almost surely, 2^216265305212 is an apocalyptic number.

216265305212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216265305212 is a deficient number, since it is larger than the sum of its proper divisors (199828349548).

216265305212 is a wasteful number, since it uses less digits than its factorization.

216265305212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102842 (or 102829 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 216265305212 its reverse (212503562612), we get a palindrome (428768867824).

The spelling of 216265305212 in words is "two hundred sixteen billion, two hundred sixty-five million, three hundred five thousand, two hundred twelve".