15220422 has 48 divisors (see below), whose sum is σ = 38057760. Its totient is φ = 4306176.

The previous prime is 15220421. The next prime is 15220441. The reversal of 15220422 is 22402251.

It is a super-2 number, since 2×15220422² = 463322491716168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 15220395 and 15220404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15220421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13704 + ... + 14772.

It is an arithmetic number, because the mean of its divisors is an integer number (792870).

Almost surely, 2^15220422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15220422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19028880).

15220422 is an abundant number, since it is smaller than the sum of its proper divisors (22837338).

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

15220422 is a wasteful number, since it uses less digits than its factorization.

15220422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 15220422 is about 3901.3359250390. The cubic root of 15220422 is about 247.8233545245.

Adding to 15220422 its reverse (22402251), we get a palindrome (37622673).

The spelling of 15220422 in words is "fifteen million, two hundred twenty thousand, four hundred twenty-two".