82309557 has 32 divisors (see below), whose sum is σ = 125706240. Its totient is φ = 47448000.

The previous prime is 82309541. The next prime is 82309559. The reversal of 82309557 is 75590328.

It is not a de Polignac number, because 82309557 - 2⁴ = 82309541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82309559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61744 + ... + 63062.

It is an arithmetic number, because the mean of its divisors is an integer number (3928320).

Almost surely, 2^82309557 is an apocalyptic number.

It is an amenable number.

82309557 is a deficient number, since it is larger than the sum of its proper divisors (43396683).

82309557 is a wasteful number, since it uses less digits than its factorization.

82309557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 82309557 is about 9072.4614631312. The cubic root of 82309557 is about 434.9941550278.

The spelling of 82309557 in words is "eighty-two million, three hundred nine thousand, five hundred fifty-seven".