84211155 has 72 divisors (see below), whose sum is σ = 171544464. Its totient is φ = 38102400.

The previous prime is 84211151. The next prime is 84211163. The reversal of 84211155 is 55111248.

It is not a de Polignac number, because 84211155 - 2² = 84211151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84211151) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 399000 + ... + 399210.

It is an arithmetic number, because the mean of its divisors is an integer number (2382562).

Almost surely, 2^84211155 is an apocalyptic number.

84211155 is an abundant number, since it is smaller than the sum of its proper divisors (87333309).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84211155 is a wasteful number, since it uses less digits than its factorization.

84211155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 407 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 84211155 is about 9176.6636093953. The cubic root of 84211155 is about 438.3185741375.

It can be divided in two parts, 8421 and 1155, that multiplied together give a triangular number (9726255 = T₄₄₁₀).

The spelling of 84211155 in words is "eighty-four million, two hundred eleven thousand, one hundred fifty-five".