135057831 has 4 divisors (see below), whose sum is σ = 180077112. Its totient is φ = 90038552.

The previous prime is 135057799. The next prime is 135057841. The reversal of 135057831 is 138750531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138750531 = 3 ⋅46250177.

It is a cyclic number.

It is not a de Polignac number, because 135057831 - 2⁵ = 135057799 is a prime.

It is a super-2 number, since 2×135057831² = 36481235428849122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135057792 and 135057801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135057841) 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, 22509636 + ... + 22509641.

It is an arithmetic number, because the mean of its divisors is an integer number (45019278).

Almost surely, 2^135057831 is an apocalyptic number.

135057831 is a deficient number, since it is larger than the sum of its proper divisors (45019281).

135057831 is an equidigital number, since it uses as much as digits as its factorization.

135057831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45019280.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 135057831 is about 11621.4384221576. The cubic root of 135057831 is about 513.0660251153.

The spelling of 135057831 in words is "one hundred thirty-five million, fifty-seven thousand, eight hundred thirty-one".