218562942 has 16 divisors (see below), whose sum is σ = 470751120. Its totient is φ = 67250112.

The previous prime is 218562917. The next prime is 218562961. The reversal of 218562942 is 249265812.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 218562942.

It is a congruent number.

It is an unprimeable number.

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, 1400967 + ... + 1401122.

It is an arithmetic number, because the mean of its divisors is an integer number (29421945).

Almost surely, 2^218562942 is an apocalyptic number.

218562942 is an abundant number, since it is smaller than the sum of its proper divisors (252188178).

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

218562942 is a wasteful number, since it uses less digits than its factorization.

218562942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802107.

The product of its digits is 69120, while the sum is 39.

The square root of 218562942 is about 14783.8743907002. The cubic root of 218562942 is about 602.3637698688.

The spelling of 218562942 in words is "two hundred eighteen million, five hundred sixty-two thousand, nine hundred forty-two".