15120222 has 32 divisors (see below), whose sum is σ = 32810400. Its totient is φ = 4617600.

The previous prime is 15120187. The next prime is 15120227. The reversal of 15120222 is 22202151.

It is a super-2 number, since 2×15120222² = 457242226658568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15120227) 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, 10972 + ... + 12272.

It is an arithmetic number, because the mean of its divisors is an integer number (1025325).

Almost surely, 2^15120222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15120222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16405200).

15120222 is an abundant number, since it is smaller than the sum of its proper divisors (17690178).

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

15120222 is a wasteful number, since it uses less digits than its factorization.

15120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 15120222 is about 3888.4729650597. The cubic root of 15120222 is about 247.2783282013.

Adding to 15120222 its reverse (22202151), we get a palindrome (37322373).

The spelling of 15120222 in words is "fifteen million, one hundred twenty thousand, two hundred twenty-two".