13423131 has 8 divisors (see below), whose sum is σ = 19886160. Its totient is φ = 8948736.

The previous prime is 13423117. The next prime is 13423199. The reversal of 13423131 is 13132431.

13423131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13423131 - 2¹⁰ = 13422107 is a prime.

It is a super-2 number, since 2×13423131² = 360360891686322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13423231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248550 + ... + 248603.

It is an arithmetic number, because the mean of its divisors is an integer number (2485770).

Almost surely, 2^13423131 is an apocalyptic number.

13423131 is a deficient number, since it is larger than the sum of its proper divisors (6463029).

13423131 is an equidigital number, since it uses as much as digits as its factorization.

13423131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497162 (or 497156 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 13423131 is about 3663.7591350961. The cubic root of 13423131 is about 237.6573642230.

Adding to 13423131 its reverse (13132431), we get a palindrome (26555562).

The spelling of 13423131 in words is "thirteen million, four hundred twenty-three thousand, one hundred thirty-one".