135311143 has 8 divisors (see below), whose sum is σ = 156295440. Its totient is φ = 115774080.

The previous prime is 135311119. The next prime is 135311149. The reversal of 135311143 is 341113531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135311143 - 2⁹ = 135310631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135311149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361608 + ... + 361981.

It is an arithmetic number, because the mean of its divisors is an integer number (19536930).

Almost surely, 2^135311143 is an apocalyptic number.

135311143 is a deficient number, since it is larger than the sum of its proper divisors (20984297).

135311143 is a wasteful number, since it uses less digits than its factorization.

135311143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723617.

The product of its digits is 540, while the sum is 22.

The square root of 135311143 is about 11632.3317954742. The cubic root of 135311143 is about 513.3865905372.

Adding to 135311143 its reverse (341113531), we get a palindrome (476424674).

The spelling of 135311143 in words is "one hundred thirty-five million, three hundred eleven thousand, one hundred forty-three".