216470842 has 16 divisors (see below), whose sum is σ = 376178112. Its totient is φ = 91501920.

The previous prime is 216470833. The next prime is 216470867. The reversal of 216470842 is 248074612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216470798 and 216470807.

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, 104884 + ... + 106927.

It is an arithmetic number, because the mean of its divisors is an integer number (23511132).

Almost surely, 2^216470842 is an apocalyptic number.

216470842 is a deficient number, since it is larger than the sum of its proper divisors (159707270).

216470842 is a wasteful number, since it uses less digits than its factorization.

216470842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211893.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 216470842 is about 14712.9481070246. The cubic root of 216470842 is about 600.4356484223.

The spelling of 216470842 in words is "two hundred sixteen million, four hundred seventy thousand, eight hundred forty-two".