81036315 has 16 divisors (see below), whose sum is σ = 144064800. Its totient is φ = 43219296.

The previous prime is 81036283. The next prime is 81036359. The reversal of 81036315 is 51363018.

It is not a de Polignac number, because 81036315 - 2⁵ = 81036283 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 300000 + ... + 300269.

It is an arithmetic number, because the mean of its divisors is an integer number (9004050).

Almost surely, 2^81036315 is an apocalyptic number.

81036315 is a deficient number, since it is larger than the sum of its proper divisors (63028485).

81036315 is a wasteful number, since it uses less digits than its factorization.

81036315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600283 (or 600277 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 81036315 is about 9002.0172739226. The cubic root of 81036315 is about 432.7395222872.

The spelling of 81036315 in words is "eighty-one million, thirty-six thousand, three hundred fifteen".