340531 has 4 divisors (see below), whose sum is σ = 341712. Its totient is φ = 339352.

The previous prime is 340519. The next prime is 340541. The reversal of 340531 is 135043.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 340531 - 2¹⁷ = 209459 is a prime.

It is a super-2 number, since 2×340531² = 231922723922, which contains 22 as substring.

It is a Duffinian number.

340531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (340541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165 + ... + 841.

It is an arithmetic number, because the mean of its divisors is an integer number (85428).

2³⁴⁰⁵³¹ is an apocalyptic number.

340531 is a deficient number, since it is larger than the sum of its proper divisors (1181).

340531 is an equidigital number, since it uses as much as digits as its factorization.

340531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 340531 is about 583.5503405877. The cubic root of 340531 is about 69.8316361928.

Adding to 340531 its reverse (135043), we get a palindrome (475574).

The spelling of 340531 in words is "three hundred forty thousand, five hundred thirty-one".