216332253 has 6 divisors (see below), whose sum is σ = 312479934. Its totient is φ = 144221496.

The previous prime is 216332251. The next prime is 216332287. The reversal of 216332253 is 352233612.

216332253 is a `hidden beast` number, since 2 + 1 + 633 + 2 + 25 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 162486009 + 53846244 = 12747^2 + 7338^2 .

It is not a de Polignac number, because 216332253 - 2¹ = 216332251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216332251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12018450 + ... + 12018467.

It is an arithmetic number, because the mean of its divisors is an integer number (52079989).

Almost surely, 2^216332253 is an apocalyptic number.

It is an amenable number.

216332253 is a deficient number, since it is larger than the sum of its proper divisors (96147681).

216332253 is a wasteful number, since it uses less digits than its factorization.

216332253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24036923 (or 24036920 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 216332253 is about 14708.2375898678. The cubic root of 216332253 is about 600.3074840623.

Adding to 216332253 its reverse (352233612), we get a palindrome (568565865).

The spelling of 216332253 in words is "two hundred sixteen million, three hundred thirty-two thousand, two hundred fifty-three".