81773050 has 48 divisors (see below), whose sum is σ = 159936192. Its totient is φ = 31046400.

The previous prime is 81773033. The next prime is 81773059. The reversal of 81773050 is 5037718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81773059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242482 + ... + 242818.

It is an arithmetic number, because the mean of its divisors is an integer number (3332004).

Almost surely, 2^81773050 is an apocalyptic number.

81773050 is a deficient number, since it is larger than the sum of its proper divisors (78163142).

81773050 is a wasteful number, since it uses less digits than its factorization.

81773050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 81773050 is about 9042.8452380874. The cubic root of 81773050 is about 434.0469733325.

The spelling of 81773050 in words is "eighty-one million, seven hundred seventy-three thousand, fifty".