216242733 has 24 divisors (see below), whose sum is σ = 343586880. Its totient is φ = 120550080.

The previous prime is 216242731. The next prime is 216242749. The reversal of 216242733 is 337242612.

It is not a de Polignac number, because 216242733 - 2¹ = 216242731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216242733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216242731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11913 + ... + 23966.

It is an arithmetic number, because the mean of its divisors is an integer number (14316120).

Almost surely, 2^216242733 is an apocalyptic number.

It is an amenable number.

216242733 is a deficient number, since it is larger than the sum of its proper divisors (127344147).

216242733 is a wasteful number, since it uses less digits than its factorization.

216242733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35937 (or 35930 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 216242733 is about 14705.1940823642. The cubic root of 216242733 is about 600.2246686406.

The spelling of 216242733 in words is "two hundred sixteen million, two hundred forty-two thousand, seven hundred thirty-three".