83555555 has 4 divisors (see below), whose sum is σ = 100266672. Its totient is φ = 66844440.

The previous prime is 83555539. The next prime is 83555587. The reversal of 83555555 is 55555538.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55555538 = 2 ⋅27777769.

It is not a de Polignac number, because 83555555 - 2⁴ = 83555539 is a prime.

It is a Duffinian number.

83555555 is a modest number, since divided by 55555 gives 835 as remainder.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8355551 + ... + 8355560.

It is an arithmetic number, because the mean of its divisors is an integer number (25066668).

Almost surely, 2^83555555 is an apocalyptic number.

83555555 is a deficient number, since it is larger than the sum of its proper divisors (16711117).

83555555 is a wasteful number, since it uses less digits than its factorization.

83555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16711116.

The product of its digits is 375000, while the sum is 41.

The square root of 83555555 is about 9140.8727701462. The cubic root of 83555555 is about 437.1781447757.

The spelling of 83555555 in words is "eighty-three million, five hundred fifty-five thousand, five hundred fifty-five".