84155281 has 8 divisors (see below), whose sum is σ = 97029504. Its totient is φ = 71494080.

The previous prime is 84155273. The next prime is 84155293. The reversal of 84155281 is 18255148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84155281 - 2³ = 84155273 is a prime.

It is a super-2 number, since 2×84155281² = 14164222640377922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84155231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52405 + ... + 53986.

It is an arithmetic number, because the mean of its divisors is an integer number (12128688).

Almost surely, 2^84155281 is an apocalyptic number.

It is an amenable number.

84155281 is a deficient number, since it is larger than the sum of its proper divisors (12874223).

84155281 is a wasteful number, since it uses less digits than its factorization.

84155281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106511.

The product of its digits is 12800, while the sum is 34.

The square root of 84155281 is about 9173.6187516160. The cubic root of 84155281 is about 438.2216114073.

The spelling of 84155281 in words is "eighty-four million, one hundred fifty-five thousand, two hundred eighty-one".