13618031 has 6 divisors (see below), whose sum is σ = 15841440. Its totient is φ = 11672556.

The previous prime is 13618009. The next prime is 13618043. The reversal of 13618031 is 13081631.

It is not a de Polignac number, because 13618031 - 2¹⁴ = 13601647 is a prime.

It is a super-2 number, since 2×13618031² = 370901536633922, 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 = 13617988 and 13618006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13618091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138911 + ... + 139008.

It is an arithmetic number, because the mean of its divisors is an integer number (2640240).

Almost surely, 2^13618031 is an apocalyptic number.

13618031 is a deficient number, since it is larger than the sum of its proper divisors (2223409).

13618031 is an equidigital number, since it uses as much as digits as its factorization.

13618031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277933 (or 277926 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 13618031 is about 3690.2616438404. The cubic root of 13618031 is about 238.8020805036.

Adding to 13618031 its reverse (13081631), we get a palindrome (26699662).

The spelling of 13618031 in words is "thirteen million, six hundred eighteen thousand, thirty-one".