531139 has 8 divisors (see below), whose sum is σ = 633600. Its totient is φ = 435336.

The previous prime is 531133. The next prime is 531143. The reversal of 531139 is 931135.

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

It is a cyclic number.

It is not a de Polignac number, because 531139 - 2¹³ = 522947 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (531133) 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, 1489 + ... + 1810.

It is an arithmetic number, because the mean of its divisors is an integer number (79200).

2⁵³¹¹³⁹ is an apocalyptic number.

531139 is a deficient number, since it is larger than the sum of its proper divisors (102461).

531139 is a wasteful number, since it uses less digits than its factorization.

531139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329.

The product of its digits is 405, while the sum is 22.

The square root of 531139 is about 728.7928375060. The cubic root of 531139 is about 80.9846539032.

The spelling of 531139 in words is "five hundred thirty-one thousand, one hundred thirty-nine".