84255555 has 16 divisors (see below), whose sum is σ = 140670720. Its totient is φ = 42982368.

The previous prime is 84255547. The next prime is 84255559. The reversal of 84255555 is 55555248.

It is not a de Polignac number, because 84255555 - 2³ = 84255547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84255559) 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 15 ways as a sum of consecutive naturals, for example, 121765 + ... + 122454.

It is an arithmetic number, because the mean of its divisors is an integer number (8791920).

Almost surely, 2^84255555 is an apocalyptic number.

84255555 is a deficient number, since it is larger than the sum of its proper divisors (56415165).

84255555 is a wasteful number, since it uses less digits than its factorization.

84255555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244250.

The product of its digits is 200000, while the sum is 39.

The square root of 84255555 is about 9179.0824704869. The cubic root of 84255555 is about 438.3955945171.

The spelling of 84255555 in words is "eighty-four million, two hundred fifty-five thousand, five hundred fifty-five".