82545805 has 4 divisors (see below), whose sum is σ = 99054972. Its totient is φ = 66036640.

The previous prime is 82545763. The next prime is 82545817. The reversal of 82545805 is 50854528.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45846441 + 36699364 = 6771^2 + 6058^2 .

It is not a de Polignac number, because 82545805 - 2⁹ = 82545293 is a prime.

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, 8254576 + ... + 8254585.

It is an arithmetic number, because the mean of its divisors is an integer number (24763743).

Almost surely, 2^82545805 is an apocalyptic number.

It is an amenable number.

82545805 is a deficient number, since it is larger than the sum of its proper divisors (16509167).

82545805 is a wasteful number, since it uses less digits than its factorization.

82545805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16509166.

The product of its (nonzero) digits is 64000, while the sum is 37.

The square root of 82545805 is about 9085.4721946633. The cubic root of 82545805 is about 435.4099363697.

The spelling of 82545805 in words is "eighty-two million, five hundred forty-five thousand, eight hundred five".