13531144061 has 2 divisors, whose sum is σ = 13531144062. Its totient is φ = 13531144060.

The previous prime is 13531144043. The next prime is 13531144069. The reversal of 13531144061 is 16044113531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11798087161 + 1733056900 = 108619^2 + 41630^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531144061 - 2²⁶ = 13464035197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13531144069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765572030 + 6765572031.

It is an arithmetic number, because the mean of its divisors is an integer number (6765572031).

Almost surely, 2^13531144061 is an apocalyptic number.

It is an amenable number.

13531144061 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531144061 is an equidigital number, since it uses as much as digits as its factorization.

13531144061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 13531144061 its reverse (16044113531), we get a palindrome (29575257592).

The spelling of 13531144061 in words is "thirteen billion, five hundred thirty-one million, one hundred forty-four thousand, sixty-one".