83220531 has 16 divisors (see below), whose sum is σ = 114159360. Its totient is φ = 53903520.

The previous prime is 83220521. The next prime is 83220539. The reversal of 83220531 is 13502238.

It is not a de Polignac number, because 83220531 - 2¹¹ = 83218483 is a prime.

It is a super-2 number, since 2×83220531² = 13851313559843922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83220539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12450 + ... + 17928.

It is an arithmetic number, because the mean of its divisors is an integer number (7134960).

Almost surely, 2^83220531 is an apocalyptic number.

83220531 is a deficient number, since it is larger than the sum of its proper divisors (30938829).

83220531 is a wasteful number, since it uses less digits than its factorization.

83220531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 83220531 is about 9122.5287612591. The cubic root of 83220531 is about 436.5930595456.

Adding to 83220531 its reverse (13502238), we get a palindrome (96722769).

The spelling of 83220531 in words is "eighty-three million, two hundred twenty thousand, five hundred thirty-one".