83131346821 has 8 divisors (see below), whose sum is σ = 83322059040. Its totient is φ = 82940831568.

The previous prime is 83131346803. The next prime is 83131346827. The reversal of 83131346821 is 12864313138.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83131346821 - 2¹⁵ = 83131314053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83131346827) 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 7 ways as a sum of consecutive naturals, for example, 813055 + ... + 909571.

It is an arithmetic number, because the mean of its divisors is an integer number (10415257380).

Almost surely, 2^83131346821 is an apocalyptic number.

It is an amenable number.

83131346821 is a deficient number, since it is larger than the sum of its proper divisors (190712219).

83131346821 is a wasteful number, since it uses less digits than its factorization.

83131346821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98483.

The product of its digits is 82944, while the sum is 40.

Adding to 83131346821 its reverse (12864313138), we get a palindrome (95995659959).

The spelling of 83131346821 in words is "eighty-three billion, one hundred thirty-one million, three hundred forty-six thousand, eight hundred twenty-one".