81342055 has 8 divisors (see below), whose sum is σ = 97794144. Its totient is φ = 64951200.

The previous prime is 81342031. The next prime is 81342077. The reversal of 81342055 is 55024318.

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

It is not a de Polignac number, because 81342055 - 2¹⁵ = 81309287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12331 + ... + 17740.

It is an arithmetic number, because the mean of its divisors is an integer number (12224268).

Almost surely, 2^81342055 is an apocalyptic number.

81342055 is a deficient number, since it is larger than the sum of its proper divisors (16452089).

81342055 is a wasteful number, since it uses less digits than its factorization.

81342055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30617.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 81342055 is about 9018.9830357973. The cubic root of 81342055 is about 433.2830635308.

The spelling of 81342055 in words is "eighty-one million, three hundred forty-two thousand, fifty-five".