115343971531 has 4 divisors (see below), whose sum is σ = 115822577464. Its totient is φ = 114865365600.

The previous prime is 115343971529. The next prime is 115343971537. The reversal of 115343971531 is 135179343511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135179343511 = 95131 ⋅1420981.

It is a cyclic number.

It is not a de Polignac number, because 115343971531 - 2¹ = 115343971529 is a prime.

It is a super-2 number, since 2×115343971531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115343971537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239302605 + ... + 239303086.

It is an arithmetic number, because the mean of its divisors is an integer number (28955644366).

Almost surely, 2^115343971531 is an apocalyptic number.

115343971531 is a deficient number, since it is larger than the sum of its proper divisors (478605933).

115343971531 is an equidigital number, since it uses as much as digits as its factorization.

115343971531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478605932.

The product of its digits is 170100, while the sum is 43.

The spelling of 115343971531 in words is "one hundred fifteen billion, three hundred forty-three million, nine hundred seventy-one thousand, five hundred thirty-one".