216013842 has 24 divisors (see below), whose sum is σ = 510578640. Its totient is φ = 65458680.

The previous prime is 216013823. The next prime is 216013873. The reversal of 216013842 is 248310612.

216013842 is a `hidden beast` number, since 21 + 601 + 38 + 4 + 2 = 666.

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, 545292 + ... + 545687.

It is an arithmetic number, because the mean of its divisors is an integer number (21274110).

Almost surely, 2^216013842 is an apocalyptic number.

216013842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

216013842 is an abundant number, since it is smaller than the sum of its proper divisors (294564798).

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

216013842 is a wasteful number, since it uses less digits than its factorization.

216013842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090998 (or 1090995 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 216013842 is about 14697.4093635579. The cubic root of 216013842 is about 600.0128163929.

The spelling of 216013842 in words is "two hundred sixteen million, thirteen thousand, eight hundred forty-two".