15221622 has 32 divisors (see below), whose sum is σ = 34513920. Its totient is φ = 4436640.

The previous prime is 15221617. The next prime is 15221629. The reversal of 15221622 is 22612251.

It is a happy number.

15221622 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15221629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3654 + ... + 6617.

It is an arithmetic number, because the mean of its divisors is an integer number (1078560).

Almost surely, 2^15221622 is an apocalyptic number.

15221622 is an abundant number, since it is smaller than the sum of its proper divisors (19292298).

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

15221622 is a wasteful number, since it uses less digits than its factorization.

15221622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308.

The product of its digits is 480, while the sum is 21.

The square root of 15221622 is about 3901.4897154805. The cubic root of 15221622 is about 247.8298672701.

Adding to 15221622 its reverse (22612251), we get a palindrome (37833873).

The spelling of 15221622 in words is "fifteen million, two hundred twenty-one thousand, six hundred twenty-two".