13108431 has 16 divisors (see below), whose sum is σ = 20384000. Its totient is φ = 7489944.

The previous prime is 13108429. The next prime is 13108451. The reversal of 13108431 is 13480131.

It is not a de Polignac number, because 13108431 - 2¹ = 13108429 is a prime.

It is a super-2 number, since 2×13108431² = 343661926563522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 13108398 and 13108407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13108451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5341 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (1274000).

Almost surely, 2^13108431 is an apocalyptic number.

13108431 is a deficient number, since it is larger than the sum of its proper divisors (7275569).

13108431 is an equidigital number, since it uses as much as digits as its factorization.

13108431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12763 (or 12749 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 13108431 is about 3620.5567251460. The cubic root of 13108431 is about 235.7853969364.

Adding to 13108431 its reverse (13480131), we get a palindrome (26588562).

It can be divided in two parts, 131084 and 31, that multiplied together give a palindrome (4063604).

The spelling of 13108431 in words is "thirteen million, one hundred eight thousand, four hundred thirty-one".