15320135513 has 6 divisors (see below), whose sum is σ = 15552211626. Its totient is φ = 15091472352.

The previous prime is 15320135483. The next prime is 15320135539. The reversal of 15320135513 is 31553102351.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9321323209 + 5998812304 = 96547^2 + 77452^2 .

It is not a de Polignac number, because 15320135513 - 2¹⁸ = 15319873369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15320135213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1701920 + ... + 1710897.

It is an arithmetic number, because the mean of its divisors is an integer number (2592035271).

Almost surely, 2^15320135513 is an apocalyptic number.

It is an amenable number.

15320135513 is a deficient number, since it is larger than the sum of its proper divisors (232076113).

15320135513 is an frugal number, since it uses more digits than its factorization.

15320135513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412951 (or 3412884 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 29.

Adding to 15320135513 its reverse (31553102351), we get a palindrome (46873237864).

The spelling of 15320135513 in words is "fifteen billion, three hundred twenty million, one hundred thirty-five thousand, five hundred thirteen".