82555557 has 16 divisors (see below), whose sum is σ = 126456960. Its totient is φ = 46927872.

The previous prime is 82555541. The next prime is 82555559. The reversal of 82555557 is 75555528.

It is not a de Polignac number, because 82555557 - 2⁴ = 82555541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82555559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6132 + ... + 14237.

It is an arithmetic number, because the mean of its divisors is an integer number (7903560).

Almost surely, 2^82555557 is an apocalyptic number.

It is an amenable number.

82555557 is a deficient number, since it is larger than the sum of its proper divisors (43901403).

82555557 is a wasteful number, since it uses less digits than its factorization.

82555557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20572.

The product of its digits is 350000, while the sum is 42.

The square root of 82555557 is about 9086.0088597800. The cubic root of 82555557 is about 435.4270822057.

The spelling of 82555557 in words is "eighty-two million, five hundred fifty-five thousand, five hundred fifty-seven".