84452181 has 16 divisors (see below), whose sum is σ = 123041280. Its totient is φ = 51099120.

The previous prime is 84452171. The next prime is 84452197. The reversal of 84452181 is 18125448.

It is not a de Polignac number, because 84452181 - 2⁵ = 84452149 is a prime.

It is a super-2 number, since 2×84452181² = 14264341751313522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84452111) 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, 22656 + ... + 26118.

It is an arithmetic number, because the mean of its divisors is an integer number (7690080).

Almost surely, 2^84452181 is an apocalyptic number.

It is an amenable number.

84452181 is a deficient number, since it is larger than the sum of its proper divisors (38589099).

84452181 is a wasteful number, since it uses less digits than its factorization.

84452181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216.

The product of its digits is 10240, while the sum is 33.

The square root of 84452181 is about 9189.7867766342. The cubic root of 84452181 is about 438.7363554494.

The spelling of 84452181 in words is "eighty-four million, four hundred fifty-two thousand, one hundred eighty-one".