217280553 has 32 divisors (see below), whose sum is σ = 357753600. Its totient is φ = 116847360.

The previous prime is 217280543. The next prime is 217280579. The reversal of 217280553 is 355082712.

217280553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 217280553 - 2⁶ = 217280489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217280533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11283 + ... + 23703.

It is an arithmetic number, because the mean of its divisors is an integer number (11179800).

Almost surely, 2^217280553 is an apocalyptic number.

It is an amenable number.

217280553 is a deficient number, since it is larger than the sum of its proper divisors (140473047).

217280553 is a wasteful number, since it uses less digits than its factorization.

217280553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12462 (or 12448 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 217280553 is about 14740.4393760837. The cubic root of 217280553 is about 601.1833617794.

The spelling of 217280553 in words is "two hundred seventeen million, two hundred eighty thousand, five hundred fifty-three".