15222016 has 36 divisors (see below), whose sum is σ = 30747892. Its totient is φ = 7520256.

The previous prime is 15221963. The next prime is 15222041. The reversal of 15222016 is 61022251.

It can be written as a sum of positive squares in 2 ways, for example, as 2262016 + 12960000 = 1504^2 + 3600^2 .

It is a super-2 number, since 2×15222016² = 463419542208512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15221984 and 15222002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24526 + ... + 25138.

Almost surely, 2^15222016 is an apocalyptic number.

15222016 is a gapful number since it is divisible by the number (16) 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 15222016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15373946).

15222016 is an abundant number, since it is smaller than the sum of its proper divisors (15525876).

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

15222016 is an frugal number, since it uses more digits than its factorization.

15222016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 15222016 is about 3901.5402086868. The cubic root of 15222016 is about 247.8320055469.

Adding to 15222016 its reverse (61022251), we get a palindrome (76244267).

The spelling of 15222016 in words is "fifteen million, two hundred twenty-two thousand, sixteen".