15222219 has 12 divisors (see below), whose sum is σ = 20746344. Its totient is φ = 9927904.

The previous prime is 15222197. The next prime is 15222223. The reversal of 15222219 is 91222251.

15222219 = 355² + 356² + ... + 448².

15222219 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15222219 - 2⁷ = 15222091 is a prime.

It is a super-2 number, since 2×15222219² = 463431902567922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15222239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5479 + ... + 7775.

It is an arithmetic number, because the mean of its divisors is an integer number (1728862).

Almost surely, 2^15222219 is an apocalyptic number.

15222219 is a deficient number, since it is larger than the sum of its proper divisors (5524125).

15222219 is an equidigital number, since it uses as much as digits as its factorization.

15222219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394 (or 2347 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 15222219 is about 3901.5662239670. The cubic root of 15222219 is about 247.8331072335.

It can be divided in two parts, 1522 and 2219, that added together give a triangular number (3741 = T₈₆).

The spelling of 15222219 in words is "fifteen million, two hundred twenty-two thousand, two hundred nineteen".