23223155 has 4 divisors (see below), whose sum is σ = 27867792. Its totient is φ = 18578520.

The previous prime is 23223143. The next prime is 23223157. The reversal of 23223155 is 55132232.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23223155 - 2²⁴ = 6445939 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 23223155.

It is not an unprimeable number, because it can be changed into a prime (23223157) 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, 2322311 + ... + 2322320.

It is an arithmetic number, because the mean of its divisors is an integer number (6966948).

Almost surely, 2^23223155 is an apocalyptic number.

23223155 is a deficient number, since it is larger than the sum of its proper divisors (4644637).

23223155 is an equidigital number, since it uses as much as digits as its factorization.

23223155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644636.

The product of its digits is 1800, while the sum is 23.

The square root of 23223155 is about 4819.0408796772. The cubic root of 23223155 is about 285.3034830200.

Adding to 23223155 its reverse (55132232), we get a palindrome (78355387).

The spelling of 23223155 in words is "twenty-three million, two hundred twenty-three thousand, one hundred fifty-five".