531399 has 8 divisors (see below), whose sum is σ = 772992. Its totient is φ = 322040.

The previous prime is 531383. The next prime is 531457. The reversal of 531399 is 993135.

531399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 531399 - 2⁴ = 531383 is a prime.

It is an Ulam number.

It is a nialpdrome in base 3, base 9 and base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 531399.

It is not an unprimeable number, because it can be changed into a prime (531359) 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, 8019 + ... + 8084.

It is an arithmetic number, because the mean of its divisors is an integer number (96624).

531399 is a Friedman number, since it can be written as 9^(5+1)-39-3, using all its digits and the basic arithmetic operations.

2⁵³¹³⁹⁹ is an apocalyptic number.

531399 is a deficient number, since it is larger than the sum of its proper divisors (241593).

531399 is a wasteful number, since it uses less digits than its factorization.

531399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16117.

The product of its digits is 3645, while the sum is 30.

The square root of 531399 is about 728.9711928465. The cubic root of 531399 is about 80.9978661227.

It can be divided in two parts, 53 and 1399, that multiplied together give a palindrome (74147).

The spelling of 531399 in words is "five hundred thirty-one thousand, three hundred ninety-nine".