218056742 has 16 divisors (see below), whose sum is σ = 338720400. Its totient is φ = 105157920.

The previous prime is 218056723. The next prime is 218056747. The reversal of 218056742 is 247650812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218056747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90392 + ... + 92772.

It is an arithmetic number, because the mean of its divisors is an integer number (21170025).

Almost surely, 2^218056742 is an apocalyptic number.

218056742 is a deficient number, since it is larger than the sum of its proper divisors (120663658).

218056742 is a wasteful number, since it uses less digits than its factorization.

218056742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 218056742 is about 14766.7444617966. The cubic root of 218056742 is about 601.8983780076.

The spelling of 218056742 in words is "two hundred eighteen million, fifty-six thousand, seven hundred forty-two".