216536 has 8 divisors (see below), whose sum is σ = 406020. Its totient is φ = 108264.

The previous prime is 216523. The next prime is 216551. The reversal of 216536 is 635612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216536.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13526 + ... + 13541.

2²¹⁶⁵³⁶ is an apocalyptic number.

It is an amenable number.

216536 is a deficient number, since it is larger than the sum of its proper divisors (189484).

216536 is a wasteful number, since it uses less digits than its factorization.

216536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27073 (or 27069 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 216536 is about 465.3342884422. The cubic root of 216536 is about 60.0495886345.

The spelling of 216536 in words is "two hundred sixteen thousand, five hundred thirty-six".