135531355351231 has 4 divisors (see below), whose sum is σ = 154892977544272. Its totient is φ = 116169733158192.

The previous prime is 135531355351229. The next prime is 135531355351237. The reversal of 135531355351231 is 132153553135531.

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

It is not a de Polignac number, because 135531355351231 - 2¹ = 135531355351229 is a prime.

It is a super-2 number, since 2×135531355351231² (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 (135531355351237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9680811096510 + ... + 9680811096523.

It is an arithmetic number, because the mean of its divisors is an integer number (38723244386068).

Almost surely, 2^{135531355351231} is an apocalyptic number.

135531355351231 is a deficient number, since it is larger than the sum of its proper divisors (19361622193041).

135531355351231 is an equidigital number, since it uses as much as digits as its factorization.

135531355351231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19361622193040.

The product of its digits is 1518750, while the sum is 46.

The spelling of 135531355351231 in words is "one hundred thirty-five trillion, five hundred thirty-one billion, three hundred fifty-five million, three hundred fifty-one thousand, two hundred thirty-one".