83581057 has 32 divisors (see below), whose sum is σ = 106444800. Its totient is φ = 63980928.

The previous prime is 83581051. The next prime is 83581079. The reversal of 83581057 is 75018538.

It is a cyclic number.

It is not a de Polignac number, because 83581057 - 2³ = 83581049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83581051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272098 + ... + 272404.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^83581057 is an apocalyptic number.

It is an amenable number.

83581057 is a deficient number, since it is larger than the sum of its proper divisors (22863743).

83581057 is a wasteful number, since it uses less digits than its factorization.

83581057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 83581057 is about 9142.2676071093. The cubic root of 83581057 is about 437.2226173145. Note that the first 3 decimals are identical.

The spelling of 83581057 in words is "eighty-three million, five hundred eighty-one thousand, fifty-seven".