15005132521 has 2 divisors, whose sum is σ = 15005132522. Its totient is φ = 15005132520.

The previous prime is 15005132497. The next prime is 15005132539. The reversal of 15005132521 is 12523150051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14970746025 + 34386496 = 122355^2 + 5864^2 .

It is an emirp because it is prime and its reverse (12523150051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15005132521 - 2³¹ = 12857648873 is a prime.

It is not a weakly prime, because it can be changed into another prime (15005132581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7502566260 + 7502566261.

It is an arithmetic number, because the mean of its divisors is an integer number (7502566261).

Almost surely, 2^15005132521 is an apocalyptic number.

It is an amenable number.

15005132521 is a deficient number, since it is larger than the sum of its proper divisors (1).

15005132521 is an equidigital number, since it uses as much as digits as its factorization.

15005132521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 15005132521 its reverse (12523150051), we get a palindrome (27528282572).

The spelling of 15005132521 in words is "fifteen billion, five million, one hundred thirty-two thousand, five hundred twenty-one".