15214220 has 48 divisors (see below), whose sum is σ = 36886080. Its totient is φ = 5163264.

The previous prime is 15214189. The next prime is 15214249. The reversal of 15214220 is 2241251.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14762 + ... + 15758.

It is an arithmetic number, because the mean of its divisors is an integer number (768460).

Almost surely, 2^15214220 is an apocalyptic number.

15214220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15214220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18443040).

15214220 is an abundant number, since it is smaller than the sum of its proper divisors (21671860).

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

15214220 is a wasteful number, since it uses less digits than its factorization.

15214220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 15214220 is about 3900.5409881195. The cubic root of 15214220 is about 247.7896890265.

Adding to 15214220 its reverse (2241251), we get a palindrome (17455471).

The spelling of 15214220 in words is "fifteen million, two hundred fourteen thousand, two hundred twenty".