13505512 has 8 divisors (see below), whose sum is σ = 25322850. Its totient is φ = 6752752.

The previous prime is 13505507. The next prime is 13505519. The reversal of 13505512 is 21550531.

13505512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 3481956 = 3166^2 + 1866^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (13505519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844087 + ... + 844102.

Almost surely, 2^13505512 is an apocalyptic number.

It is an amenable number.

13505512 is a deficient number, since it is larger than the sum of its proper divisors (11817338).

13505512 is a wasteful number, since it uses less digits than its factorization.

13505512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688195 (or 1688191 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 13505512 is about 3674.9846258182. The cubic root of 13505512 is about 238.1425598843.

The spelling of 13505512 in words is "thirteen million, five hundred five thousand, five hundred twelve".