531279 has 20 divisors (see below), whose sum is σ = 907984. Its totient is φ = 303264.

The previous prime is 531263. The next prime is 531281. The reversal of 531279 is 972135.

531279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 531279 - 2⁴ = 531263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 5 + 3⁸ + 2¹⁹ + 1 + 7³ + 9² .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531229) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99 + ... + 1035.

531279 is a Friedman number, since it can be written as 27*(3^9-5-1), using all its digits and the basic arithmetic operations.

2⁵³¹²⁷⁹ is an apocalyptic number.

531279 is a deficient number, since it is larger than the sum of its proper divisors (376705).

531279 is an equidigital number, since it uses as much as digits as its factorization.

531279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956 (or 947 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 531279 is about 728.8888804201. Note that the first 5 decimals coincide. The cubic root of 531279 is about 80.9917687109.

The spelling of 531279 in words is "five hundred thirty-one thousand, two hundred seventy-nine".