83322781 has 4 divisors (see below), whose sum is σ = 83363200. Its totient is φ = 83282364.

The previous prime is 83322769. The next prime is 83322803. The reversal of 83322781 is 18722338.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83322781 - 2⁵ = 83322749 is a prime.

It is a super-2 number, since 2×83322781² = 13885371667147922, which 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 (83322181) 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, 16941 + ... + 21298.

It is an arithmetic number, because the mean of its divisors is an integer number (20840800).

Almost surely, 2^83322781 is an apocalyptic number.

It is an amenable number.

83322781 is a deficient number, since it is larger than the sum of its proper divisors (40419).

83322781 is a wasteful number, since it uses less digits than its factorization.

83322781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40418.

The product of its digits is 16128, while the sum is 34.

The square root of 83322781 is about 9128.1312983546. The cubic root of 83322781 is about 436.7717949654.

The spelling of 83322781 in words is "eighty-three million, three hundred twenty-two thousand, seven hundred eighty-one".