216874542 has 64 divisors (see below), whose sum is σ = 474211584. Its totient is φ = 65856000.

The previous prime is 216874523. The next prime is 216874547. The reversal of 216874542 is 245478612.

It is a self number, because there is not a number n which added to its sum of digits gives 216874542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216874547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 863917 + ... + 864167.

It is an arithmetic number, because the mean of its divisors is an integer number (7409556).

Almost surely, 2^216874542 is an apocalyptic number.

216874542 is an abundant number, since it is smaller than the sum of its proper divisors (257337042).

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

216874542 is a wasteful number, since it uses less digits than its factorization.

216874542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513.

The product of its digits is 107520, while the sum is 39.

The square root of 216874542 is about 14726.6609250027. The cubic root of 216874542 is about 600.8086707076.

The spelling of 216874542 in words is "two hundred sixteen million, eight hundred seventy-four thousand, five hundred forty-two".