83220481 has 4 divisors (see below), whose sum is σ = 83261700. Its totient is φ = 83179264.

The previous prime is 83220451. The next prime is 83220493. The reversal of 83220481 is 18402238.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18402238 = 2 ⋅9201119.

It can be written as a sum of positive squares in 2 ways, for example, as 23853456 + 59367025 = 4884^2 + 7705^2 .

It is a cyclic number.

It is not a de Polignac number, because 83220481 - 2⁷ = 83220353 is a prime.

It is a super-2 number, since 2×83220481² = 13851296915742722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83220421) 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, 17416 + ... + 21673.

It is an arithmetic number, because the mean of its divisors is an integer number (20815425).

Almost surely, 2^83220481 is an apocalyptic number.

It is an amenable number.

83220481 is a deficient number, since it is larger than the sum of its proper divisors (41219).

83220481 is a wasteful number, since it uses less digits than its factorization.

83220481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41218.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 83220481 is about 9122.5260207905. The cubic root of 83220481 is about 436.5929721086.

The spelling of 83220481 in words is "eighty-three million, two hundred twenty thousand, four hundred eighty-one".