23215173 has 4 divisors (see below), whose sum is σ = 30953568. Its totient is φ = 15476780.

The previous prime is 23215151. The next prime is 23215189. The reversal of 23215173 is 37151232.

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 23215173 - 2¹² = 23211077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23215103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3869193 + ... + 3869198.

It is an arithmetic number, because the mean of its divisors is an integer number (7738392).

Almost surely, 2^23215173 is an apocalyptic number.

It is an amenable number.

23215173 is a deficient number, since it is larger than the sum of its proper divisors (7738395).

23215173 is an equidigital number, since it uses as much as digits as its factorization.

23215173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7738394.

The product of its digits is 1260, while the sum is 24.

The square root of 23215173 is about 4818.2126354074. The cubic root of 23215173 is about 285.2707921796.

It can be divided in two parts, 2 and 3215173, that multiplied together give a palindrome (6430346).

The spelling of 23215173 in words is "twenty-three million, two hundred fifteen thousand, one hundred seventy-three".