13345631 has 4 divisors (see below), whose sum is σ = 14372232. Its totient is φ = 12319032.

The previous prime is 13345621. The next prime is 13345643. The reversal of 13345631 is 13654331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13345631 is a prime.

It is a super-2 number, since 2×13345631² = 356211733576322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13345631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13345621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513281 + ... + 513306.

It is an arithmetic number, because the mean of its divisors is an integer number (3593058).

Almost surely, 2^13345631 is an apocalyptic number.

13345631 is a deficient number, since it is larger than the sum of its proper divisors (1026601).

13345631 is a wasteful number, since it uses less digits than its factorization.

13345631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026600.

The product of its digits is 3240, while the sum is 26.

The square root of 13345631 is about 3653.1672559575. The cubic root of 13345631 is about 237.1991003779.

Adding to 13345631 its reverse (13654331), we get a palindrome (26999962).

The spelling of 13345631 in words is "thirteen million, three hundred forty-five thousand, six hundred thirty-one".