13118431 has 2 divisors, whose sum is σ = 13118432. Its totient is φ = 13118430.

The previous prime is 13118429. The next prime is 13118437. The reversal of 13118431 is 13481131.

13118431 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (13481131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13118431 - 2¹ = 13118429 is a prime.

It is a super-2 number, since 2×13118431² = 344186463803522, which contains 22 as substring.

Together with 13118429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13118437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6559215 + 6559216.

It is an arithmetic number, because the mean of its divisors is an integer number (6559216).

Almost surely, 2^13118431 is an apocalyptic number.

13118431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13118431 is an equidigital number, since it uses as much as digits as its factorization.

13118431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

The square root of 13118431 is about 3621.9374649488. The cubic root of 13118431 is about 235.8453393925.

Adding to 13118431 its reverse (13481131), we get a palindrome (26599562).

The spelling of 13118431 in words is "thirteen million, one hundred eighteen thousand, four hundred thirty-one".