216512342 has 16 divisors (see below), whose sum is σ = 328929552. Its totient is φ = 106874880.

The previous prime is 216512333. The next prime is 216512369. The reversal of 216512342 is 243215612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94118 + ... + 96390.

It is an arithmetic number, because the mean of its divisors is an integer number (20558097).

Almost surely, 2^216512342 is an apocalyptic number.

216512342 is a deficient number, since it is larger than the sum of its proper divisors (112417210).

216512342 is a wasteful number, since it uses less digits than its factorization.

216512342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863.

The product of its digits is 2880, while the sum is 26.

The square root of 216512342 is about 14714.3583618179. The cubic root of 216512342 is about 600.4740161566.

Adding to 216512342 its reverse (243215612), we get a palindrome (459727954).

The spelling of 216512342 in words is "two hundred sixteen million, five hundred twelve thousand, three hundred forty-two".