131330305501 has 2 divisors, whose sum is σ = 131330305502. Its totient is φ = 131330305500.

The previous prime is 131330305499. The next prime is 131330305567. The reversal of 131330305501 is 105503033131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111840749476 + 19489556025 = 334426^2 + 139605^2 .

It is a cyclic number.

It is not a de Polignac number, because 131330305501 - 2¹ = 131330305499 is a prime.

It is a super-2 number, since 2×131330305501² (a number of 23 digits) contains 22 as substring.

Together with 131330305499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131330305591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65665152750 + 65665152751.

It is an arithmetic number, because the mean of its divisors is an integer number (65665152751).

Almost surely, 2^131330305501 is an apocalyptic number.

It is an amenable number.

131330305501 is a deficient number, since it is larger than the sum of its proper divisors (1).

131330305501 is an equidigital number, since it uses as much as digits as its factorization.

131330305501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025, while the sum is 25.

Adding to 131330305501 its reverse (105503033131), we get a palindrome (236833338632).

The spelling of 131330305501 in words is "one hundred thirty-one billion, three hundred thirty million, three hundred five thousand, five hundred one".