82051771 has 6 divisors (see below), whose sum is σ = 83422716. Its totient is φ = 80703000.

The previous prime is 82051721. The next prime is 82051777. The reversal of 82051771 is 17715028.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-82051771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82051777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7305 + ... + 14746.

It is an arithmetic number, because the mean of its divisors is an integer number (13903786).

Almost surely, 2^82051771 is an apocalyptic number.

82051771 is a deficient number, since it is larger than the sum of its proper divisors (1370945).

82051771 is an equidigital number, since it uses as much as digits as its factorization.

82051771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22173 (or 22112 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 82051771 is about 9058.2432623550. The cubic root of 82051771 is about 434.5395594847.

Adding to 82051771 its reverse (17715028), we get a palindrome (99766799).

The spelling of 82051771 in words is "eighty-two million, fifty-one thousand, seven hundred seventy-one".