216510342 has 16 divisors (see below), whose sum is σ = 435290112. Its totient is φ = 71791880.

The previous prime is 216510337. The next prime is 216510383. The reversal of 216510342 is 243015612.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 93318 + ... + 95609.

It is an arithmetic number, because the mean of its divisors is an integer number (27205632).

Almost surely, 2^216510342 is an apocalyptic number.

216510342 is an abundant number, since it is smaller than the sum of its proper divisors (218779770).

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

216510342 is a wasteful number, since it uses less digits than its factorization.

216510342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189123.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 216510342 is about 14714.2904008314. The cubic root of 216510342 is about 600.4721672216.

Adding to 216510342 its reverse (243015612), we get a palindrome (459525954).

The spelling of 216510342 in words is "two hundred sixteen million, five hundred ten thousand, three hundred forty-two".