213670221077273 has 4 divisors (see below), whose sum is σ = 221038159735140. Its totient is φ = 206302282419408.

The previous prime is 213670221077249. The next prime is 213670221077309. The reversal of 213670221077273 is 372770122076312.

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 43082380856089 + 170587840221184 = 6563717^2 + 13060928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213670221077273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213670221077233) 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, 3683969328890 + ... + 3683969328947.

It is an arithmetic number, because the mean of its divisors is an integer number (55259539933785).

Almost surely, 2^{213670221077273} is an apocalyptic number.

It is an amenable number.

213670221077273 is a deficient number, since it is larger than the sum of its proper divisors (7367938657867).

213670221077273 is an equidigital number, since it uses as much as digits as its factorization.

213670221077273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367938657866.

The product of its (nonzero) digits is 2074464, while the sum is 50.

The spelling of 213670221077273 in words is "two hundred thirteen trillion, six hundred seventy billion, two hundred twenty-one million, seventy-seven thousand, two hundred seventy-three".