216603501212 has 24 divisors (see below), whose sum is σ = 433365203040. Its totient is φ = 92796171840.

The previous prime is 216603501193. The next prime is 216603501229. The reversal of 216603501212 is 212105306612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334387 + ... + 1487882.

It is an arithmetic number, because the mean of its divisors is an integer number (18056883460).

Almost surely, 2^216603501212 is an apocalyptic number.

It is an amenable number.

216603501212 is an abundant number, since it is smaller than the sum of its proper divisors (216761701828).

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

216603501212 is a wasteful number, since it uses less digits than its factorization.

216603501212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825021 (or 2825019 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 216603501212 its reverse (212105306612), we get a palindrome (428708807824).

The spelling of 216603501212 in words is "two hundred sixteen billion, six hundred three million, five hundred one thousand, two hundred twelve".