15223145 has 8 divisors (see below), whose sum is σ = 20877504. Its totient is φ = 10438704.

The previous prime is 15223129. The next prime is 15223147. The reversal of 15223145 is 54132251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15223145 - 2⁴ = 15223129 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 15223145.

It is not an unprimeable number, because it can be changed into a prime (15223147) 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 7 ways as a sum of consecutive naturals, for example, 217439 + ... + 217508.

It is an arithmetic number, because the mean of its divisors is an integer number (2609688).

Almost surely, 2^15223145 is an apocalyptic number.

It is an amenable number.

15223145 is a deficient number, since it is larger than the sum of its proper divisors (5654359).

15223145 is an equidigital number, since it uses as much as digits as its factorization.

15223145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434959.

The product of its digits is 1200, while the sum is 23.

The square root of 15223145 is about 3901.6848924535. The cubic root of 15223145 is about 247.8381325369.

Adding to 15223145 its reverse (54132251), we get a palindrome (69355396).

The spelling of 15223145 in words is "fifteen million, two hundred twenty-three thousand, one hundred forty-five".