81880203 has 8 divisors (see below), whose sum is σ = 109897216. Its totient is φ = 54225000.

The previous prime is 81880181. The next prime is 81880217. The reversal of 81880203 is 30208818.

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

It is not a de Polignac number, because 81880203 - 2⁵ = 81880171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81880243) 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, 89923 + ... + 90828.

It is an arithmetic number, because the mean of its divisors is an integer number (13737152).

Almost surely, 2^81880203 is an apocalyptic number.

81880203 is a deficient number, since it is larger than the sum of its proper divisors (28017013).

81880203 is a wasteful number, since it uses less digits than its factorization.

81880203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180905.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 81880203 is about 9048.7680376944. The cubic root of 81880203 is about 434.2364780460.

The spelling of 81880203 in words is "eighty-one million, eight hundred eighty thousand, two hundred three".