81055303 has 8 divisors (see below), whose sum is σ = 98083872. Its totient is φ = 65389056.

The previous prime is 81055279. The next prime is 81055309. The reversal of 81055303 is 30355018.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81055303 - 2¹⁷ = 80924231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81055309) 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, 340450 + ... + 340687.

It is an arithmetic number, because the mean of its divisors is an integer number (12260484).

Almost surely, 2^81055303 is an apocalyptic number.

81055303 is a deficient number, since it is larger than the sum of its proper divisors (17028569).

81055303 is a wasteful number, since it uses less digits than its factorization.

81055303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681161.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 81055303 is about 9003.0718646471. The cubic root of 81055303 is about 432.7733187250.

The spelling of 81055303 in words is "eighty-one million, fifty-five thousand, three hundred three".