15252217 has 4 divisors (see below), whose sum is σ = 15744256. Its totient is φ = 14760180.

The previous prime is 15252203. The next prime is 15252227. The reversal of 15252217 is 71225251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71225251 = 1933 ⋅36847.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15252217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15252191 and 15252200.

It is not an unprimeable number, because it can be changed into a prime (15252227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245973 + ... + 246034.

It is an arithmetic number, because the mean of its divisors is an integer number (3936064).

Almost surely, 2^15252217 is an apocalyptic number.

It is an amenable number.

15252217 is a deficient number, since it is larger than the sum of its proper divisors (492039).

15252217 is an equidigital number, since it uses as much as digits as its factorization.

15252217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492038.

The product of its digits is 1400, while the sum is 25.

The square root of 15252217 is about 3905.4086854003. The cubic root of 15252217 is about 247.9957996600.

Adding to 15252217 its reverse (71225251), we get a palindrome (86477468).

The spelling of 15252217 in words is "fifteen million, two hundred fifty-two thousand, two hundred seventeen".