82519057 has 4 divisors (see below), whose sum is σ = 82591780. Its totient is φ = 82446336.

The previous prime is 82519051. The next prime is 82519061. The reversal of 82519057 is 75091528.

It is a Cunningham number, because it is equal to 9084²+1.

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 65221776 + 17297281 = 8076^2 + 4159^2 .

It is a cyclic number.

It is not a de Polignac number, because 82519057 - 2³ = 82519049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82519051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34632 + ... + 36937.

It is an arithmetic number, because the mean of its divisors is an integer number (20647945).

Almost surely, 2^82519057 is an apocalyptic number.

It is an amenable number.

82519057 is a deficient number, since it is larger than the sum of its proper divisors (72723).

82519057 is a wasteful number, since it uses less digits than its factorization.

82519057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72722.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 82519057 is about 9084.0000550418. Note that the first 4 decimals coincide. The cubic root of 82519057 is about 435.3629014612.

The spelling of 82519057 in words is "eighty-two million, five hundred nineteen thousand, fifty-seven".