73057213 has 4 divisors (see below), whose sum is σ = 73125148. Its totient is φ = 72989280.

The previous prime is 73057207. The next prime is 73057241. The reversal of 73057213 is 31275037.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53538489 + 19518724 = 7317^2 + 4418^2 .

It is a cyclic number.

It is not a de Polignac number, because 73057213 - 2²¹ = 70960061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73057813) 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, 32328 + ... + 34513.

It is an arithmetic number, because the mean of its divisors is an integer number (18281287).

Almost surely, 2^73057213 is an apocalyptic number.

It is an amenable number.

73057213 is a deficient number, since it is larger than the sum of its proper divisors (67935).

73057213 is a wasteful number, since it uses less digits than its factorization.

73057213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67934.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 73057213 is about 8547.3512271346. The cubic root of 73057213 is about 418.0430749319.

The spelling of 73057213 in words is "seventy-three million, fifty-seven thousand, two hundred thirteen".