13505312 has 12 divisors (see below), whose sum is σ = 26588646. Its totient is φ = 6752640.

The previous prime is 13505299. The next prime is 13505321. The reversal of 13505312 is 21350531.

It can be written as a sum of positive squares in only one way, i.e., 13278736 + 226576 = 3644^2 + 476^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210989 + ... + 211052.

Almost surely, 2^13505312 is an apocalyptic number.

It is an amenable number.

13505312 is a deficient number, since it is larger than the sum of its proper divisors (13083334).

13505312 is an equidigital number, since it uses as much as digits as its factorization.

13505312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422051 (or 422043 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 13505312 is about 3674.9574147193. The cubic root of 13505312 is about 238.1413843458.

Adding to 13505312 its reverse (21350531), we get a palindrome (34855843).

The spelling of 13505312 in words is "thirteen million, five hundred five thousand, three hundred twelve".