73312117213 has 4 divisors (see below), whose sum is σ = 73315469628. Its totient is φ = 73308764800.

The previous prime is 73312117187. The next prime is 73312117271. The reversal of 73312117213 is 31271121337.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31271121337 = 523 ⋅59791819.

It can be written as a sum of positive squares in 2 ways, for example, as 54670857124 + 18641260089 = 233818^2 + 136533^2 .

It is a cyclic number.

It is not a de Polignac number, because 73312117213 - 2²¹ = 73310020061 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 (73312117283) 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, 1643188 + ... + 1687213.

It is an arithmetic number, because the mean of its divisors is an integer number (18328867407).

Almost surely, 2^73312117213 is an apocalyptic number.

It is an amenable number.

73312117213 is a deficient number, since it is larger than the sum of its proper divisors (3352415).

73312117213 is a wasteful number, since it uses less digits than its factorization.

73312117213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352414.

The product of its digits is 5292, while the sum is 31.

The spelling of 73312117213 in words is "seventy-three billion, three hundred twelve million, one hundred seventeen thousand, two hundred thirteen".