145531241117 has 2 divisors, whose sum is σ = 145531241118. Its totient is φ = 145531241116.

The previous prime is 145531241083. The next prime is 145531241137. The reversal of 145531241117 is 711142135541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81369844516 + 64161396601 = 285254^2 + 253301^2 .

It is a cyclic number.

It is not a de Polignac number, because 145531241117 - 2²⁰ = 145530192541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145531241137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72765620558 + 72765620559.

It is an arithmetic number, because the mean of its divisors is an integer number (72765620559).

Almost surely, 2^145531241117 is an apocalyptic number.

It is an amenable number.

145531241117 is a deficient number, since it is larger than the sum of its proper divisors (1).

145531241117 is an equidigital number, since it uses as much as digits as its factorization.

145531241117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 35.

Adding to 145531241117 its reverse (711142135541), we get a palindrome (856673376658).

The spelling of 145531241117 in words is "one hundred forty-five billion, five hundred thirty-one million, two hundred forty-one thousand, one hundred seventeen".