81049203 has 12 divisors (see below), whose sum is σ = 120235648. Its totient is φ = 52572240.

The previous prime is 81049201. The next prime is 81049207. The reversal of 81049203 is 30294018.

It is not a de Polignac number, because 81049203 - 2¹ = 81049201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81049201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121363 + ... + 122028.

Almost surely, 2^81049203 is an apocalyptic number.

81049203 is a deficient number, since it is larger than the sum of its proper divisors (39186445).

81049203 is a wasteful number, since it uses less digits than its factorization.

81049203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243434 (or 243431 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 81049203 is about 9002.7330850137. The cubic root of 81049203 is about 432.7624620080.

The spelling of 81049203 in words is "eighty-one million, forty-nine thousand, two hundred three".