13180531 has 16 divisors (see below), whose sum is σ = 16316608. Its totient is φ = 10368000.

The previous prime is 13180523. The next prime is 13180571. The reversal of 13180531 is 13508131.

13180531 is nontrivially palindromic in base 15.

It is a 10-Lehmer number, since φ(13180531) divides (13180531-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 13180531 - 2³ = 13180523 is a prime.

It is a super-2 number, since 2×13180531² = 347452794883922, which contains 22 as substring.

It is the 3631-st Hogben number.

It is not an unprimeable number, because it can be changed into a prime (13180501) by changing a digit.

It is a nontrivial repunit in base 3630.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21631 + ... + 22231.

It is an arithmetic number, because the mean of its divisors is an integer number (1019788).

Almost surely, 2^13180531 is an apocalyptic number.

13180531 is a deficient number, since it is larger than the sum of its proper divisors (3136077).

13180531 is a wasteful number, since it uses less digits than its factorization.

13180531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 13180531 is about 3630.5001032916. The cubic root of 13180531 is about 236.2169017581.

Adding to 13180531 its reverse (13508131), we get a palindrome (26688662).

The spelling of 13180531 in words is "thirteen million, one hundred eighty thousand, five hundred thirty-one".