13800031 has 4 divisors (see below), whose sum is σ = 15771472. Its totient is φ = 11828592.

The previous prime is 13800019. The next prime is 13800049. The reversal of 13800031 is 13000831.

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

It is a cyclic number.

It is not a de Polignac number, because 13800031 - 2⁹ = 13799519 is a prime.

It is a super-2 number, since 2×13800031² = 380881711201922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13799978 and 13800014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13800071) 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 3 ways as a sum of consecutive naturals, for example, 985710 + ... + 985723.

It is an arithmetic number, because the mean of its divisors is an integer number (3942868).

Almost surely, 2^13800031 is an apocalyptic number.

13800031 is a deficient number, since it is larger than the sum of its proper divisors (1971441).

13800031 is an equidigital number, since it uses as much as digits as its factorization.

13800031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971440.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13800031 is about 3714.8392966587. The cubic root of 13800031 is about 239.8612102639.

Adding to 13800031 its reverse (13000831), we get a palindrome (26800862).

The spelling of 13800031 in words is "thirteen million, eight hundred thousand, thirty-one".