13685511 has 16 divisors (see below), whose sum is σ = 20980224. Its totient is φ = 7773024.

The previous prime is 13685479. The next prime is 13685521. The reversal of 13685511 is 11558631.

It is not a de Polignac number, because 13685511 - 2⁵ = 13685479 is a prime.

It is a super-2 number, since 2×13685511² = 374586422662242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13685521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1750 + ... + 5516.

It is an arithmetic number, because the mean of its divisors is an integer number (1311264).

Almost surely, 2^13685511 is an apocalyptic number.

13685511 is a deficient number, since it is larger than the sum of its proper divisors (7294713).

13685511 is a wasteful number, since it uses less digits than its factorization.

13685511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950.

The product of its digits is 3600, while the sum is 30.

The square root of 13685511 is about 3699.3933286419. The cubic root of 13685511 is about 239.1958677507.

It can be divided in two parts, 13685 and 511, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 13685511 in words is "thirteen million, six hundred eighty-five thousand, five hundred eleven".