217235132 has 12 divisors (see below), whose sum is σ = 400170120. Its totient is φ = 102900816.

The previous prime is 217235131. The next prime is 217235149. The reversal of 217235132 is 231532712.

It is a super-2 number, since 2×217235132² = 94382205150114848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217235131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429103 + ... + 1429254.

It is an arithmetic number, because the mean of its divisors is an integer number (33347510).

Almost surely, 2^217235132 is an apocalyptic number.

It is an amenable number.

217235132 is a deficient number, since it is larger than the sum of its proper divisors (182934988).

217235132 is a wasteful number, since it uses less digits than its factorization.

217235132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858380 (or 2858378 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 217235132 is about 14738.8986019987. The cubic root of 217235132 is about 601.1414677825.

Adding to 217235132 its reverse (231532712), we get a palindrome (448767844).

The spelling of 217235132 in words is "two hundred seventeen million, two hundred thirty-five thousand, one hundred thirty-two".