81715403 has 16 divisors (see below), whose sum is σ = 102415104. Its totient is φ = 63339360.

The previous prime is 81715399. The next prime is 81715421. The reversal of 81715403 is 30451718.

It is not a de Polignac number, because 81715403 - 2² = 81715399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81715433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12476 + ... + 17862.

It is an arithmetic number, because the mean of its divisors is an integer number (6400944).

Almost surely, 2^81715403 is an apocalyptic number.

81715403 is a deficient number, since it is larger than the sum of its proper divisors (20699701).

81715403 is a wasteful number, since it uses less digits than its factorization.

81715403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5602.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 81715403 is about 9039.6572390772. The cubic root of 81715403 is about 433.9449536250.

The spelling of 81715403 in words is "eighty-one million, seven hundred fifteen thousand, four hundred three".