73035581 has 4 divisors (see below), whose sum is σ = 73052700. Its totient is φ = 73018464.

The previous prime is 73035577. The next prime is 73035593. The reversal of 73035581 is 18553037.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 39000025 + 34035556 = 6245^2 + 5834^2 .

It is a cyclic number.

It is not a de Polignac number, because 73035581 - 2² = 73035577 is a prime.

It is a super-2 number, since 2×73035581² = 10668392184015122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73032581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3575 + ... + 12603.

It is an arithmetic number, because the mean of its divisors is an integer number (18263175).

Almost surely, 2^73035581 is an apocalyptic number.

It is an amenable number.

73035581 is a deficient number, since it is larger than the sum of its proper divisors (17119).

73035581 is an equidigital number, since it uses as much as digits as its factorization.

73035581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17118.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 73035581 is about 8546.0857121843. The cubic root of 73035581 is about 418.0018104666.

The spelling of 73035581 in words is "seventy-three million, thirty-five thousand, five hundred eighty-one".