12315022513 has 4 divisors (see below), whose sum is σ = 13039435620. Its totient is φ = 11590609408.

The previous prime is 12315022507. The next prime is 12315022541. The reversal of 12315022513 is 31522051321.

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 6667049104 + 5647973409 = 81652^2 + 75153^2 .

It is a cyclic number.

It is not a de Polignac number, because 12315022513 - 2⁹ = 12315022001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12315022553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362206528 + ... + 362206561.

It is an arithmetic number, because the mean of its divisors is an integer number (3259858905).

Almost surely, 2^12315022513 is an apocalyptic number.

It is an amenable number.

12315022513 is a deficient number, since it is larger than the sum of its proper divisors (724413107).

12315022513 is an equidigital number, since it uses as much as digits as its factorization.

12315022513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724413106.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 12315022513 its reverse (31522051321), we get a palindrome (43837073834).

The spelling of 12315022513 in words is "twelve billion, three hundred fifteen million, twenty-two thousand, five hundred thirteen".