7213243 has 2 divisors, whose sum is σ = 7213244. Its totient is φ = 7213242.

The previous prime is 7213229. The next prime is 7213273. The reversal of 7213243 is 3423127.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7213243 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7213223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606621 + 3606622.

It is an arithmetic number, because the mean of its divisors is an integer number (3606622).

Almost surely, 2^7213243 is an apocalyptic number.

7213243 is a deficient number, since it is larger than the sum of its proper divisors (1).

7213243 is an equidigital number, since it uses as much as digits as its factorization.

7213243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 22.

The square root of 7213243 is about 2685.7481266865. The cubic root of 7213243 is about 193.2161930768.

It can be divided in two parts, 721 and 3243, that multiplied together give a triangular number (2338203 = T₂₁₆₂).

The spelling of 7213243 in words is "seven million, two hundred thirteen thousand, two hundred forty-three".