538558831 has 4 divisors (see below), whose sum is σ = 538693272. Its totient is φ = 538424392.

The previous prime is 538558829. The next prime is 538558837. The reversal of 538558831 is 138855835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138855835 = 5 ⋅27771167.

It is a cyclic number.

It is not a de Polignac number, because 538558831 - 2¹ = 538558829 is a prime.

It is a super-2 number, since 2×538558831² = 580091228896173122, which 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 (538558837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61021 + ... + 69286.

It is an arithmetic number, because the mean of its divisors is an integer number (134673318).

Almost surely, 2^538558831 is an apocalyptic number.

538558831 is a deficient number, since it is larger than the sum of its proper divisors (134441).

538558831 is a wasteful number, since it uses less digits than its factorization.

538558831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134440.

The product of its digits is 576000, while the sum is 46.

The square root of 538558831 is about 23206.8703404832. The cubic root of 538558831 is about 813.6002072397.

The spelling of 538558831 in words is "five hundred thirty-eight million, five hundred fifty-eight thousand, eight hundred thirty-one".