83221655 has 8 divisors (see below), whose sum is σ = 108944784. Its totient is φ = 60524800.

The previous prime is 83221651. The next prime is 83221667. The reversal of 83221655 is 55612238.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83221655 - 2² = 83221651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83221651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756506 + ... + 756615.

It is an arithmetic number, because the mean of its divisors is an integer number (13618098).

Almost surely, 2^83221655 is an apocalyptic number.

83221655 is a deficient number, since it is larger than the sum of its proper divisors (25723129).

83221655 is a wasteful number, since it uses less digits than its factorization.

83221655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513137.

The product of its digits is 14400, while the sum is 32.

The square root of 83221655 is about 9122.5903667763. The cubic root of 83221655 is about 436.5950251198.

The spelling of 83221655 in words is "eighty-three million, two hundred twenty-one thousand, six hundred fifty-five".