135731351 has 4 divisors (see below), whose sum is σ = 155121552. Its totient is φ = 116341152.

The previous prime is 135731293. The next prime is 135731363. The reversal of 135731351 is 153137531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153137531 = 577 ⋅265403.

It is a cyclic number.

It is not a de Polignac number, because 135731351 - 2⁶ = 135731287 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 (135731551) 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, 9695090 + ... + 9695103.

It is an arithmetic number, because the mean of its divisors is an integer number (38780388).

Almost surely, 2^135731351 is an apocalyptic number.

135731351 is a deficient number, since it is larger than the sum of its proper divisors (19390201).

135731351 is an equidigital number, since it uses as much as digits as its factorization.

135731351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19390200.

The product of its digits is 4725, while the sum is 29.

The square root of 135731351 is about 11650.3798650516. The cubic root of 135731351 is about 513.9174810879.

Adding to 135731351 its reverse (153137531), we get a palindrome (288868882).

The spelling of 135731351 in words is "one hundred thirty-five million, seven hundred thirty-one thousand, three hundred fifty-one".