131445563 has 2 divisors, whose sum is σ = 131445564. Its totient is φ = 131445562.

The previous prime is 131445473. The next prime is 131445577. The reversal of 131445563 is 365544131.

It is a strong prime.

It is an emirp because it is prime and its reverse (365544131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131445563 - 2¹⁶ = 131380027 is a prime.

It is not a weakly prime, because it can be changed into another prime (131445583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65722781 + 65722782.

It is an arithmetic number, because the mean of its divisors is an integer number (65722782).

Almost surely, 2^131445563 is an apocalyptic number.

131445563 is a deficient number, since it is larger than the sum of its proper divisors (1).

131445563 is an equidigital number, since it uses as much as digits as its factorization.

131445563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 131445563 is about 11464.9711294883. The cubic root of 131445563 is about 508.4504588899.

Adding to 131445563 its reverse (365544131), we get a palindrome (496989694).

The spelling of 131445563 in words is "one hundred thirty-one million, four hundred forty-five thousand, five hundred sixty-three".