81062855 has 4 divisors (see below), whose sum is σ = 97275432. Its totient is φ = 64850280.

The previous prime is 81062843. The next prime is 81062887. The reversal of 81062855 is 55826018.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 81062855 - 2⁶ = 81062791 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 3 ways as a sum of consecutive naturals, for example, 8106281 + ... + 8106290.

It is an arithmetic number, because the mean of its divisors is an integer number (24318858).

Almost surely, 2^81062855 is an apocalyptic number.

81062855 is a deficient number, since it is larger than the sum of its proper divisors (16212577).

81062855 is a wasteful number, since it uses less digits than its factorization.

81062855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16212576.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 81062855 is about 9003.4912672807. The cubic root of 81062855 is about 432.7867589421.

The spelling of 81062855 in words is "eighty-one million, sixty-two thousand, eight hundred fifty-five".