15222643 has 8 divisors (see below), whose sum is σ = 15806336. Its totient is φ = 14644800.

The previous prime is 15222631. The next prime is 15222659. The reversal of 15222643 is 34622251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15222643 - 2⁹ = 15222131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15222673) 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 in 7 ways as a sum of consecutive naturals, for example, 4255 + ... + 6967.

It is an arithmetic number, because the mean of its divisors is an integer number (1975792).

Almost surely, 2^15222643 is an apocalyptic number.

15222643 is a deficient number, since it is larger than the sum of its proper divisors (583693).

15222643 is a wasteful number, since it uses less digits than its factorization.

15222643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925.

The product of its digits is 2880, while the sum is 25.

The square root of 15222643 is about 3901.6205607414. The cubic root of 15222643 is about 247.8354082616.

Adding to 15222643 its reverse (34622251), we get a palindrome (49844894).

The spelling of 15222643 in words is "fifteen million, two hundred twenty-two thousand, six hundred forty-three".