15222116 has 96 divisors (see below), whose sum is σ = 36126720. Its totient is φ = 5443200.

The previous prime is 15222101. The next prime is 15222131. The reversal of 15222116 is 61122251.

It is an interprime number because it is at equal distance from previous prime (15222101) and next prime (15222131).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214361 + ... + 214431.

It is an arithmetic number, because the mean of its divisors is an integer number (376320).

Almost surely, 2^15222116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15222116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18063360).

15222116 is an abundant number, since it is smaller than the sum of its proper divisors (20904604).

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

15222116 is a wasteful number, since it uses less digits than its factorization.

15222116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 143 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 15222116 is about 3901.5530241174. The cubic root of 15222116 is about 247.8325482509.

Adding to 15222116 its reverse (61122251), we get a palindrome (76344367).

The spelling of 15222116 in words is "fifteen million, two hundred twenty-two thousand, one hundred sixteen".