15223122 has 12 divisors (see below), whose sum is σ = 32983470. Its totient is φ = 5074368.

The previous prime is 15223097. The next prime is 15223129. The reversal of 15223122 is 22132251.

It can be written as a sum of positive squares in only one way, i.e., 14814801 + 408321 = 3849^2 + 639^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 845729 = 15223122 / (1 + 5 + 2 + 2 + 3 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 15223095 and 15223104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15223129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 422847 + ... + 422882.

Almost surely, 2^15223122 is an apocalyptic number.

15223122 is an abundant number, since it is smaller than the sum of its proper divisors (17760348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15223122 is a wasteful number, since it uses less digits than its factorization.

15223122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845737 (or 845734 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 15223122 is about 3901.6819450078. The cubic root of 15223122 is about 247.8380077208.

Adding to 15223122 its reverse (22132251), we get a palindrome (37355373).

The spelling of 15223122 in words is "fifteen million, two hundred twenty-three thousand, one hundred twenty-two".