538231257 has 16 divisors (see below), whose sum is σ = 832049280. Its totient is φ = 343219536.

The previous prime is 538231229. The next prime is 538231261. The reversal of 538231257 is 752132835.

It is a happy number.

It is not a de Polignac number, because 538231257 - 2¹⁵ = 538198489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (538231157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432738 + ... + 433979.

It is an arithmetic number, because the mean of its divisors is an integer number (52003080).

Almost surely, 2^538231257 is an apocalyptic number.

It is an amenable number.

538231257 is a deficient number, since it is larger than the sum of its proper divisors (293818023).

538231257 is a wasteful number, since it uses less digits than its factorization.

538231257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866749 (or 866743 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 538231257 is about 23199.8115725107. The cubic root of 538231257 is about 813.4352185624.

The spelling of 538231257 in words is "five hundred thirty-eight million, two hundred thirty-one thousand, two hundred fifty-seven".