15123122249 has 2 divisors, whose sum is σ = 15123122250. Its totient is φ = 15123122248.

The previous prime is 15123122227. The next prime is 15123122291. The reversal of 15123122249 is 94222132151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14549184400 + 573937849 = 120620^2 + 23957^2 .

It is a cyclic number.

It is not a de Polignac number, because 15123122249 - 2²⁸ = 14854686793 is a prime.

It is not a weakly prime, because it can be changed into another prime (15123122149) 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, 7561561124 + 7561561125.

It is an arithmetic number, because the mean of its divisors is an integer number (7561561125).

Almost surely, 2^15123122249 is an apocalyptic number.

It is an amenable number.

15123122249 is a deficient number, since it is larger than the sum of its proper divisors (1).

15123122249 is an equidigital number, since it uses as much as digits as its factorization.

15123122249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The spelling of 15123122249 in words is "fifteen billion, one hundred twenty-three million, one hundred twenty-two thousand, two hundred forty-nine".