13243511505 has 24 divisors (see below), whose sum is σ = 24649149312. Its totient is φ = 6054176352.

The previous prime is 13243511473. The next prime is 13243511507. The reversal of 13243511505 is 50511534231.

It is not a de Polignac number, because 13243511505 - 2⁵ = 13243511473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13243511507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9008457 + ... + 9009926.

It is an arithmetic number, because the mean of its divisors is an integer number (1027047888).

Almost surely, 2^13243511505 is an apocalyptic number.

13243511505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13243511505 is a deficient number, since it is larger than the sum of its proper divisors (11405637807).

13243511505 is a wasteful number, since it uses less digits than its factorization.

13243511505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18018405 (or 18018398 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 13243511505 in words is "thirteen billion, two hundred forty-three million, five hundred eleven thousand, five hundred five".