13655631 has 8 divisors (see below), whose sum is σ = 19862784. Its totient is φ = 8276120.

The previous prime is 13655611. The next prime is 13655633.

13655631 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13655631 - 2⁶ = 13655567 is a prime.

It is a super-2 number, since 2×13655631² = 372952516016322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13655633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206871 + ... + 206936.

It is an arithmetic number, because the mean of its divisors is an integer number (2482848).

Almost surely, 2^13655631 is an apocalyptic number.

13655631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13655631 is a deficient number, since it is larger than the sum of its proper divisors (6207153).

13655631 is a wasteful number, since it uses less digits than its factorization.

13655631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413821.

The product of its digits is 8100, while the sum is 30.

The square root of 13655631 is about 3695.3526218752. The cubic root of 13655631 is about 239.0216596559.

It can be divided in two parts, 1365 and 5631, that added together give a palindrome (6996).

The spelling of 13655631 in words is "thirteen million, six hundred fifty-five thousand, six hundred thirty-one".