15244391 has 2 divisors, whose sum is σ = 15244392. Its totient is φ = 15244390.

The previous prime is 15244381. The next prime is 15244409. The reversal of 15244391 is 19344251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15244391 - 2¹⁰ = 15243367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15244321) 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, 7622195 + 7622196.

It is an arithmetic number, because the mean of its divisors is an integer number (7622196).

Almost surely, 2^15244391 is an apocalyptic number.

15244391 is a deficient number, since it is larger than the sum of its proper divisors (1).

15244391 is an equidigital number, since it uses as much as digits as its factorization.

15244391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 15244391 is about 3904.4066130463. The cubic root of 15244391 is about 247.9533763811.

The spelling of 15244391 in words is "fifteen million, two hundred forty-four thousand, three hundred ninety-one".