81084055 has 8 divisors (see below), whose sum is σ = 104785632. Its totient is φ = 59877408.

The previous prime is 81084053. The next prime is 81084061. The reversal of 81084055 is 55048018.

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

It is a cyclic number.

It is not a de Polignac number, because 81084055 - 2¹ = 81084053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81084053) 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, 623659 + ... + 623788.

It is an arithmetic number, because the mean of its divisors is an integer number (13098204).

Almost surely, 2^81084055 is an apocalyptic number.

81084055 is a deficient number, since it is larger than the sum of its proper divisors (23701577).

81084055 is a wasteful number, since it uses less digits than its factorization.

81084055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247465.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 81084055 is about 9004.6685113890. The cubic root of 81084055 is about 432.8244839049.

The spelling of 81084055 in words is "eighty-one million, eighty-four thousand, fifty-five".