15381222 has 16 divisors (see below), whose sum is σ = 32381760. Its totient is φ = 4857192.

The previous prime is 15381217. The next prime is 15381251. The reversal of 15381222 is 22218351.

It is a junction number, because it is equal to n+sod(n) for n = 15381192 and 15381201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67348 + ... + 67575.

It is an arithmetic number, because the mean of its divisors is an integer number (2023860).

Almost surely, 2^15381222 is an apocalyptic number.

15381222 is an abundant number, since it is smaller than the sum of its proper divisors (17000538).

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

15381222 is a wasteful number, since it uses less digits than its factorization.

15381222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134947.

The product of its digits is 960, while the sum is 24.

The square root of 15381222 is about 3921.8901055486. The cubic root of 15381222 is about 248.6930298900.

Adding to 15381222 its reverse (22218351), we get a palindrome (37599573).

The spelling of 15381222 in words is "fifteen million, three hundred eighty-one thousand, two hundred twenty-two".