216535634 has 48 divisors (see below), whose sum is σ = 392827968. Its totient is φ = 87657024.

The previous prime is 216535621. The next prime is 216535667. The reversal of 216535634 is 436535612.

It is a junction number, because it is equal to n+sod(n) for n = 216535594 and 216535603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 623849 + ... + 624195.

It is an arithmetic number, because the mean of its divisors is an integer number (8183916).

Almost surely, 2^216535634 is an apocalyptic number.

216535634 is a deficient number, since it is larger than the sum of its proper divisors (176292334).

216535634 is a wasteful number, since it uses less digits than its factorization.

216535634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 438 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 216535634 is about 14715.1498123533. The cubic root of 216535634 is about 600.4955480150.

The spelling of 216535634 in words is "two hundred sixteen million, five hundred thirty-five thousand, six hundred thirty-four".