15222247 has 2 divisors, whose sum is σ = 15222248. Its totient is φ = 15222246.

The previous prime is 15222239. The next prime is 15222257. The reversal of 15222247 is 74222251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15222247 - 2³ = 15222239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15222227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7611123 + 7611124.

It is an arithmetic number, because the mean of its divisors is an integer number (7611124).

Almost surely, 2^15222247 is an apocalyptic number.

15222247 is a deficient number, since it is larger than the sum of its proper divisors (1).

15222247 is an equidigital number, since it uses as much as digits as its factorization.

15222247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 25.

The square root of 15222247 is about 3901.5698122679. The cubic root of 15222247 is about 247.8332591895.

Adding to 15222247 its reverse (74222251), we get a palindrome (89444498).

The spelling of 15222247 in words is "fifteen million, two hundred twenty-two thousand, two hundred forty-seven".