15243132305 has 4 divisors (see below), whose sum is σ = 18291758772. Its totient is φ = 12194505840.

The previous prime is 15243132277. The next prime is 15243132319. The reversal of 15243132305 is 50323134251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10439117584 + 4804014721 = 102172^2 + 69311^2 .

It is not a de Polignac number, because 15243132305 - 2⁶ = 15243132241 is a prime.

It is a super-2 number, since 2×15243132305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1524313226 + ... + 1524313235.

It is an arithmetic number, because the mean of its divisors is an integer number (4572939693).

Almost surely, 2^15243132305 is an apocalyptic number.

It is an amenable number.

15243132305 is a deficient number, since it is larger than the sum of its proper divisors (3048626467).

15243132305 is an equidigital number, since it uses as much as digits as its factorization.

15243132305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048626466.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 15243132305 its reverse (50323134251), we get a palindrome (65566266556).

The spelling of 15243132305 in words is "fifteen billion, two hundred forty-three million, one hundred thirty-two thousand, three hundred five".