217132382031 has 4 divisors (see below), whose sum is σ = 289509842712. Its totient is φ = 144754921352.

The previous prime is 217132382029. The next prime is 217132382039. The reversal of 217132382031 is 130283231712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 217132382031 - 2¹ = 217132382029 is a prime.

It is a super-2 number, since 2×217132382031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217132381983 and 217132382001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217132382039) 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, 36188730336 + ... + 36188730341.

It is an arithmetic number, because the mean of its divisors is an integer number (72377460678).

Almost surely, 2^217132382031 is an apocalyptic number.

217132382031 is a deficient number, since it is larger than the sum of its proper divisors (72377460681).

217132382031 is an equidigital number, since it uses as much as digits as its factorization.

217132382031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72377460680.

The product of its (nonzero) digits is 12096, while the sum is 33.

The spelling of 217132382031 in words is "two hundred seventeen billion, one hundred thirty-two million, three hundred eighty-two thousand, thirty-one".