81732203 has 4 divisors (see below), whose sum is σ = 93408240. Its totient is φ = 70056168.

The previous prime is 81732199. The next prime is 81732239. The reversal of 81732203 is 30223718.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 81732203 - 2² = 81732199 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (81732263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5838008 + ... + 5838021.

It is an arithmetic number, because the mean of its divisors is an integer number (23352060).

Almost surely, 2^81732203 is an apocalyptic number.

81732203 is a deficient number, since it is larger than the sum of its proper divisors (11676037).

81732203 is a wasteful number, since it uses less digits than its factorization.

81732203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11676036.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 81732203 is about 9040.5864300940. The cubic root of 81732203 is about 433.9746900656.

The spelling of 81732203 in words is "eighty-one million, seven hundred thirty-two thousand, two hundred three".