817432241231 has 4 divisors (see below), whose sum is σ = 817434249192. Its totient is φ = 817430233272.

The previous prime is 817432241189. The next prime is 817432241233. The reversal of 817432241231 is 132142234718.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-817432241231 is a prime.

It is a super-2 number, since 2×817432241231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817432241233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152780 + ... + 1287713.

It is an arithmetic number, because the mean of its divisors is an integer number (204358562298).

Almost surely, 2^817432241231 is an apocalyptic number.

817432241231 is a deficient number, since it is larger than the sum of its proper divisors (2007961).

817432241231 is a wasteful number, since it uses less digits than its factorization.

817432241231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007960.

The product of its digits is 64512, while the sum is 38.

Adding to 817432241231 its reverse (132142234718), we get a palindrome (949574475949).

The spelling of 817432241231 in words is "eight hundred seventeen billion, four hundred thirty-two million, two hundred forty-one thousand, two hundred thirty-one".