13513431 has 8 divisors (see below), whose sum is σ = 18287104. Its totient is φ = 8874360.

The previous prime is 13513429. The next prime is 13513433. The reversal of 13513431 is 13431531.

It is an interprime number because it is at equal distance from previous prime (13513429) and next prime (13513433).

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

It is not a de Polignac number, because 13513431 - 2¹ = 13513429 is a prime.

It is a super-2 number, since 2×13513431² = 365225634783522, 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 = 13513398 and 13513407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13513433) 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, 33415 + ... + 33816.

It is an arithmetic number, because the mean of its divisors is an integer number (2285888).

Almost surely, 2^13513431 is an apocalyptic number.

13513431 is a deficient number, since it is larger than the sum of its proper divisors (4773673).

13513431 is an equidigital number, since it uses as much as digits as its factorization.

13513431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67301.

The product of its digits is 540, while the sum is 21.

The square root of 13513431 is about 3676.0618874007. The cubic root of 13513431 is about 238.1890960062.

Adding to 13513431 its reverse (13431531), we get a palindrome (26944962).

The spelling of 13513431 in words is "thirteen million, five hundred thirteen thousand, four hundred thirty-one".