81298055 has 16 divisors (see below), whose sum is σ = 104383200. Its totient is φ = 60600960.

The previous prime is 81298037. The next prime is 81298069. The reversal of 81298055 is 55089218.

It is not a de Polignac number, because 81298055 - 2¹⁴ = 81281671 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 1220 + ... + 12809.

It is an arithmetic number, because the mean of its divisors is an integer number (6523950).

Almost surely, 2^81298055 is an apocalyptic number.

81298055 is a deficient number, since it is larger than the sum of its proper divisors (23085145).

81298055 is a wasteful number, since it uses less digits than its factorization.

81298055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14114.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 81298055 is about 9016.5434064280. The cubic root of 81298055 is about 433.2049248062.

The spelling of 81298055 in words is "eighty-one million, two hundred ninety-eight thousand, fifty-five".