135512115131 has 2 divisors, whose sum is σ = 135512115132. Its totient is φ = 135512115130.

The previous prime is 135512115127. The next prime is 135512115157. The reversal of 135512115131 is 131511215531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135512115131 - 2² = 135512115127 is a prime.

It is a super-2 number, since 2×135512115131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135512115094 and 135512115103.

It is not a weakly prime, because it can be changed into another prime (135512115731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67756057565 + 67756057566.

It is an arithmetic number, because the mean of its divisors is an integer number (67756057566).

Almost surely, 2^135512115131 is an apocalyptic number.

135512115131 is a deficient number, since it is larger than the sum of its proper divisors (1).

135512115131 is an equidigital number, since it uses as much as digits as its factorization.

135512115131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250, while the sum is 29.

The spelling of 135512115131 in words is "one hundred thirty-five billion, five hundred twelve million, one hundred fifteen thousand, one hundred thirty-one".