531205 has 8 divisors (see below), whose sum is σ = 643104. Its totient is φ = 421200.

The previous prime is 531203. The next prime is 531229. The reversal of 531205 is 502135.

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

It is not a de Polignac number, because 531205 - 2¹ = 531203 is a prime.

It is a Duffinian number.

531205 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250 + ... + 1060.

It is an arithmetic number, because the mean of its divisors is an integer number (80388).

2⁵³¹²⁰⁵ is an apocalyptic number.

It is an amenable number.

531205 is a deficient number, since it is larger than the sum of its proper divisors (111899).

531205 is a wasteful number, since it uses less digits than its factorization.

531205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 531205 is about 728.8381164566. The cubic root of 531205 is about 80.9880081826.

It can be divided in two parts, 5 and 31205, that multiplied together give a square (156025 = 395²).

The spelling of 531205 in words is "five hundred thirty-one thousand, two hundred five".