215510513055 has 32 divisors (see below), whose sum is σ = 352924452864. Its totient is φ = 112247106816.

The previous prime is 215510513047. The next prime is 215510513059. The reversal of 215510513055 is 550315015512.

It is not a de Polignac number, because 215510513055 - 2³ = 215510513047 is a prime.

It is a super-3 number, since 3×215510513055³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215510513059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12267 + ... + 656636.

It is an arithmetic number, because the mean of its divisors is an integer number (11028889152).

Almost surely, 2^215510513055 is an apocalyptic number.

215510513055 is a deficient number, since it is larger than the sum of its proper divisors (137413939809).

215510513055 is a wasteful number, since it uses less digits than its factorization.

215510513055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669415.

The product of its (nonzero) digits is 18750, while the sum is 33.

Adding to 215510513055 its reverse (550315015512), we get a palindrome (765825528567).

The spelling of 215510513055 in words is "two hundred fifteen billion, five hundred ten million, five hundred thirteen thousand, fifty-five".