13440031 has 4 divisors (see below), whose sum is σ = 14661864. Its totient is φ = 12218200.

The previous prime is 13440001. The next prime is 13440041. The reversal of 13440031 is 13004431.

13440031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13440031 - 2¹⁷ = 13308959 is a prime.

It is a super-2 number, since 2×13440031² = 361268866561922, 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 = 13439987 and 13440014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440001) 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, 610900 + ... + 610921.

It is an arithmetic number, because the mean of its divisors is an integer number (3665466).

Almost surely, 2^13440031 is an apocalyptic number.

13440031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13440031 is a deficient number, since it is larger than the sum of its proper divisors (1221833).

13440031 is a wasteful number, since it uses less digits than its factorization.

13440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221832.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13440031 is about 3666.0647839339. The cubic root of 13440031 is about 237.7570609096.

Adding to 13440031 its reverse (13004431), we get a palindrome (26444462).

Subtracting from 13440031 its reverse (13004431), we obtain a square (435600 = 660²).

It can be divided in two parts, 134400 and 31, that added together give a palindrome (134431).

The spelling of 13440031 in words is "thirteen million, four hundred forty thousand, thirty-one".