81163203 has 8 divisors (see below), whose sum is σ = 118055616. Its totient is φ = 49189800.

The previous prime is 81163183. The next prime is 81163207. The reversal of 81163203 is 30236118.

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

It is not a de Polignac number, because 81163203 - 2⁵ = 81163171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81163207) 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, 1229713 + ... + 1229778.

It is an arithmetic number, because the mean of its divisors is an integer number (14756952).

Almost surely, 2^81163203 is an apocalyptic number.

81163203 is a deficient number, since it is larger than the sum of its proper divisors (36892413).

81163203 is a wasteful number, since it uses less digits than its factorization.

81163203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459505.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 81163203 is about 9009.0622708471. The cubic root of 81163203 is about 432.9652680656.

The spelling of 81163203 in words is "eighty-one million, one hundred sixty-three thousand, two hundred three".