73281145 has 32 divisors (see below), whose sum is σ = 103864320. Its totient is φ = 48591360.

The previous prime is 73281133. The next prime is 73281167. The reversal of 73281145 is 54118237.

It is not a de Polignac number, because 73281145 - 2⁹ = 73280633 is a prime.

It is a super-2 number, since 2×73281145² = 10740252425022050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319891 + ... + 320119.

It is an arithmetic number, because the mean of its divisors is an integer number (3245760).

Almost surely, 2^73281145 is an apocalyptic number.

It is an amenable number.

73281145 is a deficient number, since it is larger than the sum of its proper divisors (30583175).

73281145 is a wasteful number, since it uses less digits than its factorization.

73281145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its digits is 6720, while the sum is 31.

The square root of 73281145 is about 8560.4407012723. The cubic root of 73281145 is about 418.4697621545.

The spelling of 73281145 in words is "seventy-three million, two hundred eighty-one thousand, one hundred forty-five".