531345 has 8 divisors (see below), whose sum is σ = 850176. Its totient is φ = 283376.

The previous prime is 531343. The next prime is 531347. The reversal of 531345 is 543135.

It is an interprime number because it is at equal distance from previous prime (531343) and next prime (531347).

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 531345 - 2¹ = 531343 is a prime.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (531343) 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, 17697 + ... + 17726.

It is an arithmetic number, because the mean of its divisors is an integer number (106272).

2⁵³¹³⁴⁵ is an apocalyptic number.

It is an amenable number.

531345 is a deficient number, since it is larger than the sum of its proper divisors (318831).

531345 is a wasteful number, since it uses less digits than its factorization.

531345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35431.

The product of its digits is 900, while the sum is 21.

The square root of 531345 is about 728.9341534048. The cubic root of 531345 is about 80.9951224010.

The spelling of 531345 in words is "five hundred thirty-one thousand, three hundred forty-five".