23151223 has 4 divisors (see below), whose sum is σ = 23161000. Its totient is φ = 23141448.

The previous prime is 23151197. The next prime is 23151239. The reversal of 23151223 is 32215132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23151223 - 2¹³ = 23143031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23151223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23151283) 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, 1153 + ... + 6901.

It is an arithmetic number, because the mean of its divisors is an integer number (5790250).

Almost surely, 2^23151223 is an apocalyptic number.

23151223 is a deficient number, since it is larger than the sum of its proper divisors (9777).

23151223 is an equidigital number, since it uses as much as digits as its factorization.

23151223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9776.

The product of its digits is 360, while the sum is 19.

The square root of 23151223 is about 4811.5717806139. The cubic root of 23151223 is about 285.0086095686.

Adding to 23151223 its reverse (32215132), we get a palindrome (55366355).

The spelling of 23151223 in words is "twenty-three million, one hundred fifty-one thousand, two hundred twenty-three".