13516431 has 8 divisors (see below), whose sum is σ = 18362160. Its totient is φ = 8840832.

The previous prime is 13516423. The next prime is 13516439. The reversal of 13516431 is 13461531.

13516431 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13516423) and next prime (13516439).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13516431 - 2³ = 13516423 is a prime.

It is a super-2 number, since 2×13516431² = 365387813955522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13516439) 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, 42346 + ... + 42663.

It is an arithmetic number, because the mean of its divisors is an integer number (2295270).

Almost surely, 2^13516431 is an apocalyptic number.

13516431 is a deficient number, since it is larger than the sum of its proper divisors (4845729).

13516431 is an equidigital number, since it uses as much as digits as its factorization.

13516431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85065.

The product of its digits is 1080, while the sum is 24.

The square root of 13516431 is about 3676.4699101176. The cubic root of 13516431 is about 238.2067208028.

Adding to 13516431 its reverse (13461531), we get a palindrome (26977962).

The spelling of 13516431 in words is "thirteen million, five hundred sixteen thousand, four hundred thirty-one".