135784281331 has 2 divisors, whose sum is σ = 135784281332. Its totient is φ = 135784281330.

The previous prime is 135784281329. The next prime is 135784281389. The reversal of 135784281331 is 133182487531.

It is a weak prime.

It is an emirp because it is prime and its reverse (133182487531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135784281331 - 2¹ = 135784281329 is a prime.

It is a super-2 number, since 2×135784281331² (a number of 23 digits) contains 22 as substring.

Together with 135784281329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135784281631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67892140665 + 67892140666.

It is an arithmetic number, because the mean of its divisors is an integer number (67892140666).

Almost surely, 2^135784281331 is an apocalyptic number.

135784281331 is a deficient number, since it is larger than the sum of its proper divisors (1).

135784281331 is an equidigital number, since it uses as much as digits as its factorization.

135784281331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The spelling of 135784281331 in words is "one hundred thirty-five billion, seven hundred eighty-four million, two hundred eighty-one thousand, three hundred thirty-one".