172601213 has 4 divisors (see below), whose sum is σ = 175032288. Its totient is φ = 170170140.

The previous prime is 172601207. The next prime is 172601291. The reversal of 172601213 is 312106271.

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 172601213 - 2⁴ = 172601197 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 (172601413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215431 + ... + 1215572.

It is an arithmetic number, because the mean of its divisors is an integer number (43758072).

Almost surely, 2^172601213 is an apocalyptic number.

It is an amenable number.

172601213 is a deficient number, since it is larger than the sum of its proper divisors (2431075).

172601213 is an equidigital number, since it uses as much as digits as its factorization.

172601213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431074.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 172601213 is about 13137.7780845925. The cubic root of 172601213 is about 556.7769930053.

Adding to 172601213 its reverse (312106271), we get a palindrome (484707484).

The spelling of 172601213 in words is "one hundred seventy-two million, six hundred one thousand, two hundred thirteen".