216212046 has 16 divisors (see below), whose sum is σ = 432609744. Its totient is φ = 72039744.

The previous prime is 216212027. The next prime is 216212047. The reversal of 216212046 is 640212612.

It is a super-2 number, since 2×216212046² = 93495297671012232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216212047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10836 + ... + 23448.

It is an arithmetic number, because the mean of its divisors is an integer number (27038109).

Almost surely, 2^216212046 is an apocalyptic number.

216212046 is an abundant number, since it is smaller than the sum of its proper divisors (216397698).

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

216212046 is a wasteful number, since it uses less digits than its factorization.

216212046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15475.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 216212046 is about 14704.1506385102. The cubic root of 216212046 is about 600.1962746756.

Adding to 216212046 its reverse (640212612), we get a palindrome (856424658).

The spelling of 216212046 in words is "two hundred sixteen million, two hundred twelve thousand, forty-six".