73216313 has 4 divisors (see below), whose sum is σ = 73292688. Its totient is φ = 73139940.

The previous prime is 73216309. The next prime is 73216321. The reversal of 73216313 is 31361237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31361237 = 37 ⋅847601.

It is a cyclic number.

It is not a de Polignac number, because 73216313 - 2² = 73216309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73216333) 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 3 ways as a sum of consecutive naturals, for example, 36731 + ... + 38672.

It is an arithmetic number, because the mean of its divisors is an integer number (18323172).

Almost surely, 2^73216313 is an apocalyptic number.

It is an amenable number.

73216313 is a deficient number, since it is larger than the sum of its proper divisors (76375).

73216313 is an equidigital number, since it uses as much as digits as its factorization.

73216313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76374.

The product of its digits is 2268, while the sum is 26.

The square root of 73216313 is about 8556.6531424383. The cubic root of 73216313 is about 418.3463186853.

The spelling of 73216313 in words is "seventy-three million, two hundred sixteen thousand, three hundred thirteen".