216434542 has 8 divisors (see below), whose sum is σ = 327630600. Its totient is φ = 107224344.

The previous prime is 216434509. The next prime is 216434549. The reversal of 216434542 is 245434612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216434549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496192 + ... + 496627.

It is an arithmetic number, because the mean of its divisors is an integer number (40953825).

Almost surely, 2^216434542 is an apocalyptic number.

216434542 is a deficient number, since it is larger than the sum of its proper divisors (111196058).

216434542 is a wasteful number, since it uses less digits than its factorization.

216434542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992930.

The product of its digits is 23040, while the sum is 31.

The square root of 216434542 is about 14711.7144480173. The cubic root of 216434542 is about 600.4020841907.

The spelling of 216434542 in words is "two hundred sixteen million, four hundred thirty-four thousand, five hundred forty-two".