81003308 has 24 divisors (see below), whose sum is σ = 149787120. Its totient is φ = 38223360.

The previous prime is 81003301. The next prime is 81003319. The reversal of 81003308 is 80330018.

It is not an unprimeable number, because it can be changed into a prime (81003301) 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, 19460 + ... + 23252.

It is an arithmetic number, because the mean of its divisors is an integer number (6241130).

Almost surely, 2^81003308 is an apocalyptic number.

It is an amenable number.

81003308 is a deficient number, since it is larger than the sum of its proper divisors (68783812).

81003308 is a wasteful number, since it uses less digits than its factorization.

81003308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097 (or 4095 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 81003308 is about 9000.1837759015. The cubic root of 81003308 is about 432.6807610881.

The spelling of 81003308 in words is "eighty-one million, three thousand, three hundred eight".