216481542 has 8 divisors (see below), whose sum is σ = 432963096. Its totient is φ = 72160512.

The previous prime is 216481511. The next prime is 216481571. The reversal of 216481542 is 245184612.

It is a happy number.

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

216481542 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18040123 + ... + 18040134.

It is an arithmetic number, because the mean of its divisors is an integer number (54120387).

Almost surely, 2^216481542 is an apocalyptic number.

216481542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216481542 is a wasteful number, since it uses less digits than its factorization.

216481542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36080262.

The product of its digits is 15360, while the sum is 33.

The square root of 216481542 is about 14713.3117278198. The cubic root of 216481542 is about 600.4455412953.

The spelling of 216481542 in words is "two hundred sixteen million, four hundred eighty-one thousand, five hundred forty-two".