13106531 has 4 divisors (see below), whose sum is σ = 13222632. Its totient is φ = 12990432.

The previous prime is 13106519. The next prime is 13106539. The reversal of 13106531 is 13560131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13106531 - 2¹⁰ = 13105507 is a prime.

It is a super-2 number, since 2×13106531² = 343562309707922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13106539) 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, 57881 + ... + 58106.

It is an arithmetic number, because the mean of its divisors is an integer number (3305658).

Almost surely, 2^13106531 is an apocalyptic number.

13106531 is a deficient number, since it is larger than the sum of its proper divisors (116101).

13106531 is a wasteful number, since it uses less digits than its factorization.

13106531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116100.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 13106531 is about 3620.2943250515. The cubic root of 13106531 is about 235.7740044237.

Adding to 13106531 its reverse (13560131), we get a palindrome (26666662).

The spelling of 13106531 in words is "thirteen million, one hundred six thousand, five hundred thirty-one".