135493447231 has 4 divisors (see below), whose sum is σ = 135576218232. Its totient is φ = 135410676232.

The previous prime is 135493447223. The next prime is 135493447237. The reversal of 135493447231 is 132744394531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 135493447231 - 2³ = 135493447223 is a prime.

It is a super-2 number, since 2×135493447231² (a number of 23 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 (135493447237) 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, 41383045 + ... + 41386318.

It is an arithmetic number, because the mean of its divisors is an integer number (33894054558).

Almost surely, 2^135493447231 is an apocalyptic number.

135493447231 is a deficient number, since it is larger than the sum of its proper divisors (82771001).

135493447231 is an equidigital number, since it uses as much as digits as its factorization.

135493447231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82771000.

The product of its digits is 1088640, while the sum is 46.

The spelling of 135493447231 in words is "one hundred thirty-five billion, four hundred ninety-three million, four hundred forty-seven thousand, two hundred thirty-one".