173161213 has 4 divisors (see below), whose sum is σ = 174308128. Its totient is φ = 172014300.

The previous prime is 173161103. The next prime is 173161253. The reversal of 173161213 is 312161371.

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.

It is a cyclic number.

It is not a de Polignac number, because 173161213 - 2¹³ = 173153021 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 (173161253) 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, 573231 + ... + 573532.

It is an arithmetic number, because the mean of its divisors is an integer number (43577032).

Almost surely, 2^173161213 is an apocalyptic number.

It is an amenable number.

173161213 is a deficient number, since it is larger than the sum of its proper divisors (1146915).

173161213 is a wasteful number, since it uses less digits than its factorization.

173161213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146914.

The product of its digits is 756, while the sum is 25.

The square root of 173161213 is about 13159.0734096288. The cubic root of 173161213 is about 557.3784922909.

The spelling of 173161213 in words is "one hundred seventy-three million, one hundred sixty-one thousand, two hundred thirteen".