216537434 has 32 divisors (see below), whose sum is σ = 341496000. Its totient is φ = 102896640.

The previous prime is 216537427. The next prime is 216537437. The reversal of 216537434 is 434735612.

216537434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 216537394 and 216537403.

It is not an unprimeable number, because it can be changed into a prime (216537437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482042 + ... + 482490.

It is an arithmetic number, because the mean of its divisors is an integer number (10671750).

Almost surely, 2^216537434 is an apocalyptic number.

216537434 is a deficient number, since it is larger than the sum of its proper divisors (124958566).

216537434 is a wasteful number, since it uses less digits than its factorization.

216537434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638.

The product of its digits is 60480, while the sum is 35.

The square root of 216537434 is about 14715.2109736830. The cubic root of 216537434 is about 600.4972119274.

The spelling of 216537434 in words is "two hundred sixteen million, five hundred thirty-seven thousand, four hundred thirty-four".