216502055 has 64 divisors (see below), whose sum is σ = 361221120. Its totient is φ = 120268800.

The previous prime is 216502051. The next prime is 216502057. The reversal of 216502055 is 550205612.

216502055 = T₁₉₇₈ + T₁₉₇₉ + ... + T₂₀₈₂.

It is not a de Polignac number, because 216502055 - 2² = 216502051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216502051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 123485 + ... + 125225.

It is an arithmetic number, because the mean of its divisors is an integer number (5644080).

Almost surely, 2^216502055 is an apocalyptic number.

216502055 is a deficient number, since it is larger than the sum of its proper divisors (144719065).

216502055 is a wasteful number, since it uses less digits than its factorization.

216502055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 216502055 is about 14714.0088011391. The cubic root of 216502055 is about 600.4645060382.

Adding to 216502055 its reverse (550205612), we get a palindrome (766707667).

The spelling of 216502055 in words is "two hundred sixteen million, five hundred two thousand, fifty-five".