216198535 has 24 divisors (see below), whose sum is σ = 309170736. Its totient is φ = 144627840.

The previous prime is 216198461. The next prime is 216198581. The reversal of 216198535 is 535891612.

It is not a de Polignac number, because 216198535 - 2¹⁵ = 216165767 is a prime.

It is a super-2 number, since 2×216198535² = 93483613072292450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 717 + ... + 20806.

It is an arithmetic number, because the mean of its divisors is an integer number (12882114).

Almost surely, 2^216198535 is an apocalyptic number.

216198535 is a deficient number, since it is larger than the sum of its proper divisors (92972201).

216198535 is a wasteful number, since it uses less digits than its factorization.

216198535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21583 (or 21576 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 216198535 is about 14703.6912032319. The cubic root of 216198535 is about 600.1837724108.

The spelling of 216198535 in words is "two hundred sixteen million, one hundred ninety-eight thousand, five hundred thirty-five".