83195815 has 4 divisors (see below), whose sum is σ = 99834984. Its totient is φ = 66556648.

The previous prime is 83195779. The next prime is 83195831. The reversal of 83195815 is 51859138.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83195815 - 2⁹ = 83195303 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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, 8319577 + ... + 8319586.

It is an arithmetic number, because the mean of its divisors is an integer number (24958746).

Almost surely, 2^83195815 is an apocalyptic number.

83195815 is a deficient number, since it is larger than the sum of its proper divisors (16639169).

83195815 is a wasteful number, since it uses less digits than its factorization.

83195815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16639168.

The product of its digits is 43200, while the sum is 40.

The square root of 83195815 is about 9121.1739924201. The cubic root of 83195815 is about 436.5498334235.

The spelling of 83195815 in words is "eighty-three million, one hundred ninety-five thousand, eight hundred fifteen".