13523131 has 4 divisors (see below), whose sum is σ = 13537872. Its totient is φ = 13508392.

The previous prime is 13523129. The next prime is 13523173. The reversal of 13523131 is 13132531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13132531 = 2111 ⋅6221.

It is a cyclic number.

It is not a de Polignac number, because 13523131 - 2¹ = 13523129 is a prime.

It is a super-2 number, since 2×13523131² = 365750144086322, 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 = 13523099 and 13523108.

It is not an unprimeable number, because it can be changed into a prime (13527131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5896 + ... + 7861.

It is an arithmetic number, because the mean of its divisors is an integer number (3384468).

Almost surely, 2^13523131 is an apocalyptic number.

13523131 is the 1966-th nonagonal number.

13523131 is a deficient number, since it is larger than the sum of its proper divisors (14741).

13523131 is an equidigital number, since it uses as much as digits as its factorization.

13523131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14740.

The product of its digits is 270, while the sum is 19.

The square root of 13523131 is about 3677.3809973947. The cubic root of 13523131 is about 238.2460734345.

Adding to 13523131 its reverse (13132531), we get a palindrome (26655662).

The spelling of 13523131 in words is "thirteen million, five hundred twenty-three thousand, one hundred thirty-one".