217331132 has 6 divisors (see below), whose sum is σ = 380329488. Its totient is φ = 108665564.

The previous prime is 217331131. The next prime is 217331137. The reversal of 217331132 is 231133712.

217331132 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 217331098 and 217331107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217331131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27166388 + ... + 27166395.

It is an arithmetic number, because the mean of its divisors is an integer number (63388248).

Almost surely, 2^217331132 is an apocalyptic number.

It is an amenable number.

217331132 is a deficient number, since it is larger than the sum of its proper divisors (162998356).

217331132 is a wasteful number, since it uses less digits than its factorization.

217331132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54332787 (or 54332785 counting only the distinct ones).

The product of its digits is 756, while the sum is 23.

The square root of 217331132 is about 14742.1549306741. The cubic root of 217331132 is about 601.2300063804.

Adding to 217331132 its reverse (231133712), we get a palindrome (448464844).

The spelling of 217331132 in words is "two hundred seventeen million, three hundred thirty-one thousand, one hundred thirty-two".