216194933 has 16 divisors (see below), whose sum is σ = 232315776. Its totient is φ = 200478720.

The previous prime is 216194921. The next prime is 216194941. The reversal of 216194933 is 339491612.

It is a cyclic number.

It is not a de Polignac number, because 216194933 - 2¹² = 216190837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216194983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429560 + ... + 430062.

It is an arithmetic number, because the mean of its divisors is an integer number (14519736).

Almost surely, 2^216194933 is an apocalyptic number.

It is an amenable number.

216194933 is a deficient number, since it is larger than the sum of its proper divisors (16120843).

216194933 is a wasteful number, since it uses less digits than its factorization.

216194933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its digits is 34992, while the sum is 38.

The square root of 216194933 is about 14703.5687164715. The cubic root of 216194933 is about 600.1804392492.

It can be divided in two parts, 2161949 and 33, that multiplied together give a palindrome (71344317).

The spelling of 216194933 in words is "two hundred sixteen million, one hundred ninety-four thousand, nine hundred thirty-three".