83221706 has 8 divisors (see below), whose sum is σ = 129137220. Its totient is φ = 40175968.

The previous prime is 83221667. The next prime is 83221717. The reversal of 83221706 is 60712238.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 82719025 + 502681 = 9095^2 + 709^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717371 + ... + 717486.

Almost surely, 2^83221706 is an apocalyptic number.

83221706 is a deficient number, since it is larger than the sum of its proper divisors (45915514).

83221706 is a wasteful number, since it uses less digits than its factorization.

83221706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434888.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 83221706 is about 9122.5931620346. The cubic root of 83221706 is about 436.5951143047.

The spelling of 83221706 in words is "eighty-three million, two hundred twenty-one thousand, seven hundred six".