131115310132405 has 4 divisors (see below), whose sum is σ = 157338372158892. Its totient is φ = 104892248105920.

The previous prime is 131115310132361. The next prime is 131115310132409. The reversal of 131115310132405 is 504231013511131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42400179217764 + 88715130914641 = 6511542^2 + 9418871^2 .

It is not a de Polignac number, because 131115310132405 - 2⁴³ = 122319217110197 is a prime.

It is a super-2 number, since 2×131115310132405² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131115310132409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13111531013236 + ... + 13111531013245.

It is an arithmetic number, because the mean of its divisors is an integer number (39334593039723).

Almost surely, 2^{131115310132405} is an apocalyptic number.

It is an amenable number.

131115310132405 is a deficient number, since it is larger than the sum of its proper divisors (26223062026487).

131115310132405 is an equidigital number, since it uses as much as digits as its factorization.

131115310132405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26223062026486.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 131115310132405 its reverse (504231013511131), we get a palindrome (635346323643536).

The spelling of 131115310132405 in words is "one hundred thirty-one trillion, one hundred fifteen billion, three hundred ten million, one hundred thirty-two thousand, four hundred five".