81703544 has 32 divisors (see below), whose sum is σ = 172156320. Its totient is φ = 36068736.

The previous prime is 81703541. The next prime is 81703561. The reversal of 81703544 is 44530718.

It is a self number, because there is not a number n which added to its sum of digits gives 81703544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81703541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14687 + ... + 19470.

It is an arithmetic number, because the mean of its divisors is an integer number (5379885).

Almost surely, 2^81703544 is an apocalyptic number.

It is an amenable number.

81703544 is an abundant number, since it is smaller than the sum of its proper divisors (90452776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81703544 is a wasteful number, since it uses less digits than its factorization.

81703544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34199 (or 34195 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 81703544 is about 9039.0012722645. The cubic root of 81703544 is about 433.9239604300.

The spelling of 81703544 in words is "eighty-one million, seven hundred three thousand, five hundred forty-four".