15015140123 has 16 divisors (see below), whose sum is σ = 15607754400. Its totient is φ = 14437564416.

The previous prime is 15015140087. The next prime is 15015140207. The reversal of 15015140123 is 32104151051.

It is a cyclic number.

It is not a de Polignac number, because 15015140123 - 2¹⁰ = 15015139099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15015140923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458603 + ... + 490251.

It is an arithmetic number, because the mean of its divisors is an integer number (975484650).

Almost surely, 2^15015140123 is an apocalyptic number.

15015140123 is a deficient number, since it is larger than the sum of its proper divisors (592614277).

15015140123 is an equidigital number, since it uses as much as digits as its factorization.

15015140123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31886.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 15015140123 its reverse (32104151051), we get a palindrome (47119291174).

The spelling of 15015140123 in words is "fifteen billion, fifteen million, one hundred forty thousand, one hundred twenty-three".