217130652 has 96 divisors (see below), whose sum is σ = 587498240. Its totient is φ = 69284160.

The previous prime is 217130621. The next prime is 217130657. The reversal of 217130652 is 256031712.

It is a happy number.

217130652 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 3 + 0 + 652 = 666.

217130652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217130657) 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, 267327 + ... + 268137.

Almost surely, 2^217130652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217130652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293749120).

217130652 is an abundant number, since it is smaller than the sum of its proper divisors (370367588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217130652 is a wasteful number, since it uses less digits than its factorization.

217130652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 217130652 is about 14735.3538131936. The cubic root of 217130652 is about 601.0450786276.

It can be divided in two parts, 2171 and 30652, that added together give a palindrome (32823).

The spelling of 217130652 in words is "two hundred seventeen million, one hundred thirty thousand, six hundred fifty-two".