81838203 has 8 divisors (see below), whose sum is σ = 112880400. Its totient is φ = 52677408.

The previous prime is 81838199. The next prime is 81838213. The reversal of 81838203 is 30283818.

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

It is not a de Polignac number, because 81838203 - 2² = 81838199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81838213) 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, 470248 + ... + 470421.

It is an arithmetic number, because the mean of its divisors is an integer number (14110050).

Almost surely, 2^81838203 is an apocalyptic number.

81838203 is a deficient number, since it is larger than the sum of its proper divisors (31042197).

81838203 is a wasteful number, since it uses less digits than its factorization.

81838203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940701.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 81838203 is about 9046.4469821030. The cubic root of 81838203 is about 434.1622189429.

The spelling of 81838203 in words is "eighty-one million, eight hundred thirty-eight thousand, two hundred three".