13538516 has 6 divisors (see below), whose sum is σ = 23692410. Its totient is φ = 6769256.

The previous prime is 13538471. The next prime is 13538519. The reversal of 13538516 is 61583531.

13538516 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., 11424400 + 2114116 = 3380^2 + 1454^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13538519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1692311 + ... + 1692318.

It is an arithmetic number, because the mean of its divisors is an integer number (3948735).

Almost surely, 2^13538516 is an apocalyptic number.

It is an amenable number.

13538516 is a deficient number, since it is larger than the sum of its proper divisors (10153894).

13538516 is a wasteful number, since it uses less digits than its factorization.

13538516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384633 (or 3384631 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 13538516 is about 3679.4722447655. The cubic root of 13538516 is about 238.3363884830.

The spelling of 13538516 in words is "thirteen million, five hundred thirty-eight thousand, five hundred sixteen".