83221755 has 16 divisors (see below), whose sum is σ = 133292544. Its totient is φ = 44339040.

The previous prime is 83221753. The next prime is 83221771. The reversal of 83221755 is 55712238.

It is not a de Polignac number, because 83221755 - 2¹ = 83221753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83221753) 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 15 ways as a sum of consecutive naturals, for example, 16212 + ... + 20718.

It is an arithmetic number, because the mean of its divisors is an integer number (8330784).

Almost surely, 2^83221755 is an apocalyptic number.

83221755 is a deficient number, since it is larger than the sum of its proper divisors (50070789).

83221755 is a wasteful number, since it uses less digits than its factorization.

83221755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5746.

The product of its digits is 16800, while the sum is 33.

The square root of 83221755 is about 9122.5958476741. The cubic root of 83221755 is about 436.5951999921.

The spelling of 83221755 in words is "eighty-three million, two hundred twenty-one thousand, seven hundred fifty-five".