83157805 has 12 divisors (see below), whose sum is σ = 101971260. Its totient is φ = 65102144.

The previous prime is 83157803. The next prime is 83157821. The reversal of 83157805 is 50875138.

It can be written as a sum of positive squares in 2 ways, for example, as 28708164 + 54449641 = 5358^2 + 7379^2 .

It is not a de Polignac number, because 83157805 - 2¹ = 83157803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83157803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7281 + ... + 14809.

It is an arithmetic number, because the mean of its divisors is an integer number (8497605).

Almost surely, 2^83157805 is an apocalyptic number.

It is an amenable number.

83157805 is a deficient number, since it is larger than the sum of its proper divisors (18813455).

83157805 is an equidigital number, since it uses as much as digits as its factorization.

83157805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7628 (or 7581 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 83157805 is about 9119.0901410174. The cubic root of 83157805 is about 436.4833405483.

The spelling of 83157805 in words is "eighty-three million, one hundred fifty-seven thousand, eight hundred five".