73166213 has 4 divisors (see below), whose sum is σ = 73204608. Its totient is φ = 73127820.

The previous prime is 73166209. The next prime is 73166237. The reversal of 73166213 is 31266137.

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: 31266137 = 7 ⋅4466591.

It is a cyclic number.

It is not a de Polignac number, because 73166213 - 2² = 73166209 is a prime.

It is a super-2 number, since 2×73166213² = 10706589449522738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73166273) 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, 16181 + ... + 20202.

It is an arithmetic number, because the mean of its divisors is an integer number (18301152).

Almost surely, 2^73166213 is an apocalyptic number.

It is an amenable number.

73166213 is a deficient number, since it is larger than the sum of its proper divisors (38395).

73166213 is a wasteful number, since it uses less digits than its factorization.

73166213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38394.

The product of its digits is 4536, while the sum is 29.

The square root of 73166213 is about 8553.7250949513. The cubic root of 73166213 is about 418.2508757796.

The spelling of 73166213 in words is "seventy-three million, one hundred sixty-six thousand, two hundred thirteen".