73805281 has 15 divisors (see below), whose sum is σ = 82344865. Its totient is φ = 66150700.

The previous prime is 73805233. The next prime is 73805287. The reversal of 73805281 is 18250837.

The square root of 73805281 is 8591.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-73805281 is a prime.

It is a super-2 number, since 2×73805281² = 10894439006977922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73805287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1039476 + ... + 1039546.

Almost surely, 2^73805281 is an apocalyptic number.

73805281 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

73805281 is the 8591-st square number.

73805281 is the 4296-th centered octagonal number.

It is an amenable number.

73805281 is a deficient number, since it is larger than the sum of its proper divisors (8539584).

73805281 is an frugal number, since it uses more digits than its factorization.

73805281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The cubic root of 73805281 is about 419.4650805331.

The spelling of 73805281 in words is "seventy-three million, eight hundred five thousand, two hundred eighty-one".