131544013 has 2 divisors, whose sum is σ = 131544014. Its totient is φ = 131544012.

The previous prime is 131544001. The next prime is 131544037. The reversal of 131544013 is 310445131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124590244 + 6953769 = 11162^2 + 2637^2 .

It is an emirp because it is prime and its reverse (310445131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131544013 is a prime.

It is a super-2 number, since 2×131544013² = 34607654712288338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131544073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65772006 + 65772007.

It is an arithmetic number, because the mean of its divisors is an integer number (65772007).

Almost surely, 2^131544013 is an apocalyptic number.

It is an amenable number.

131544013 is a deficient number, since it is larger than the sum of its proper divisors (1).

131544013 is an equidigital number, since it uses as much as digits as its factorization.

131544013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131544013 is about 11469.2638386254. The cubic root of 131544013 is about 508.5773668268.

Adding to 131544013 its reverse (310445131), we get a palindrome (441989144).

The spelling of 131544013 in words is "one hundred thirty-one million, five hundred forty-four thousand, thirteen".