216013212 has 36 divisors (see below), whose sum is σ = 546535080. Its totient is φ = 71938272.

The previous prime is 216013207. The next prime is 216013229. The reversal of 216013212 is 212310612.

216013212 is a `hidden beast` number, since 21 + 601 + 32 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 2.

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, 51739 + ... + 55757.

It is an arithmetic number, because the mean of its divisors is an integer number (15181530).

Almost surely, 2^216013212 is an apocalyptic number.

It is an amenable number.

216013212 is an abundant number, since it is smaller than the sum of its proper divisors (330521868).

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

216013212 is a wasteful number, since it uses less digits than its factorization.

216013212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522 (or 5517 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 216013212 is about 14697.3879311938. The cubic root of 216013212 is about 600.0122330839.

Adding to 216013212 its reverse (212310612), we get a palindrome (428323824).

It can be divided in two parts, 216013 and 212, that added together give a square (216225 = 465²).

The spelling of 216013212 in words is "two hundred sixteen million, thirteen thousand, two hundred twelve".