15000575021 has 2 divisors, whose sum is σ = 15000575022. Its totient is φ = 15000575020.

The previous prime is 15000574969. The next prime is 15000575071. The reversal of 15000575021 is 12057500051.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11597136100 + 3403438921 = 107690^2 + 58339^2 .

It is an emirp because it is prime and its reverse (12057500051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15000575021 - 2¹⁰ = 15000573997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15000575071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7500287510 + 7500287511.

It is an arithmetic number, because the mean of its divisors is an integer number (7500287511).

Almost surely, 2^15000575021 is an apocalyptic number.

It is an amenable number.

15000575021 is a deficient number, since it is larger than the sum of its proper divisors (1).

15000575021 is an equidigital number, since it uses as much as digits as its factorization.

15000575021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1750, while the sum is 26.

The spelling of 15000575021 in words is "fifteen billion, five hundred seventy-five thousand, twenty-one".