83220732581 has 8 divisors (see below), whose sum is σ = 95659175424. Its totient is φ = 70919731440.

The previous prime is 83220732559. The next prime is 83220732631. The reversal of 83220732581 is 18523702238.

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 83220732581 - 2¹⁴ = 83220716197 is a prime.

It is a super-2 number, since 2×83220732581² (a number of 23 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 (83220732521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34359125 + ... + 34361546.

It is an arithmetic number, because the mean of its divisors is an integer number (11957396928).

Almost surely, 2^83220732581 is an apocalyptic number.

It is an amenable number.

83220732581 is a deficient number, since it is larger than the sum of its proper divisors (12438442843).

83220732581 is a wasteful number, since it uses less digits than its factorization.

83220732581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68720851.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 83220732581 in words is "eighty-three billion, two hundred twenty million, seven hundred thirty-two thousand, five hundred eighty-one".