216221818883031 has 24 divisors (see below), whose sum is σ = 338993437852160. Its totient is φ = 132011867606976.

The previous prime is 216221818882999. The next prime is 216221818883033. The reversal of 216221818883031 is 130388818122612.

It is a happy number.

216221818883031 is a `hidden beast` number, since 2 + 1 + 622 + 1 + 8 + 1 + 8 + 8 + 8 + 3 + 0 + 3 + 1 = 666.

It is not a de Polignac number, because 216221818883031 - 2⁵ = 216221818882999 is a prime.

It is a super-2 number, since 2×216221818883031² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216221818883033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7275771496 + ... + 7275801213.

Almost surely, 2^{216221818883031} is an apocalyptic number.

216221818883031 is a deficient number, since it is larger than the sum of its proper divisors (122771618969129).

216221818883031 is a wasteful number, since it uses less digits than its factorization.

216221818883031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14551572855 (or 14551572852 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The spelling of 216221818883031 in words is "two hundred sixteen trillion, two hundred twenty-one billion, eight hundred eighteen million, eight hundred eighty-three thousand, thirty-one".