83215705 has 8 divisors (see below), whose sum is σ = 99944712. Its totient is φ = 66515328.

The previous prime is 83215667. The next prime is 83215711. The reversal of 83215705 is 50751238.

It can be written as a sum of positive squares in 4 ways, for example, as 16679056 + 66536649 = 4084^2 + 8157^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 83215705 - 2¹⁷ = 83084633 is a prime.

It is a super-4 number, since 4×83215705⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132 + ... + 12901.

It is an arithmetic number, because the mean of its divisors is an integer number (12493089).

Almost surely, 2^83215705 is an apocalyptic number.

It is an amenable number.

83215705 is a deficient number, since it is larger than the sum of its proper divisors (16729007).

83215705 is a wasteful number, since it uses less digits than its factorization.

83215705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14315.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 83215705 is about 9122.2642474333. The cubic root of 83215705 is about 436.5846199662.

The spelling of 83215705 in words is "eighty-three million, two hundred fifteen thousand, seven hundred five".