82751805 has 24 divisors (see below), whose sum is σ = 143783640. Its totient is φ = 44027520.

The previous prime is 82751797. The next prime is 82751833. The reversal of 82751805 is 50815728.

It can be written as a sum of positive squares in 4 ways, for example, as 3790809 + 78960996 = 1947^2 + 8886^2 .

It is not a de Polignac number, because 82751805 - 2³ = 82751797 is a prime.

It is a super-2 number, since 2×82751805² = 13695722461516050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82751805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18751 + ... + 22739.

It is an arithmetic number, because the mean of its divisors is an integer number (5990985).

Almost surely, 2^82751805 is an apocalyptic number.

It is an amenable number.

82751805 is a deficient number, since it is larger than the sum of its proper divisors (61031835).

82751805 is a wasteful number, since it uses less digits than its factorization.

82751805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461 (or 4458 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 82751805 is about 9096.8019105618. The cubic root of 82751805 is about 435.7718361934.

The spelling of 82751805 in words is "eighty-two million, seven hundred fifty-one thousand, eight hundred five".