15135145321 has 2 divisors, whose sum is σ = 15135145322. Its totient is φ = 15135145320.

The previous prime is 15135145309. The next prime is 15135145379. The reversal of 15135145321 is 12354153151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9041157225 + 6093988096 = 95085^2 + 78064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15135145321 is a prime.

It is not a weakly prime, because it can be changed into another prime (15135145301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7567572660 + 7567572661.

It is an arithmetic number, because the mean of its divisors is an integer number (7567572661).

Almost surely, 2^15135145321 is an apocalyptic number.

It is an amenable number.

15135145321 is a deficient number, since it is larger than the sum of its proper divisors (1).

15135145321 is an equidigital number, since it uses as much as digits as its factorization.

15135145321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 31.

Adding to 15135145321 its reverse (12354153151), we get a palindrome (27489298472).

The spelling of 15135145321 in words is "fifteen billion, one hundred thirty-five million, one hundred forty-five thousand, three hundred twenty-one".