605531 has 2 divisors, whose sum is σ = 605532. Its totient is φ = 605530.

The previous prime is 605509. The next prime is 605533. The reversal of 605531 is 135506.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605531 is a prime.

It is a super-2 number, since 2×605531² = 733335583922, which contains 22 as substring.

Together with 605533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (605533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302765 + 302766.

It is an arithmetic number, because the mean of its divisors is an integer number (302766).

2⁶⁰⁵⁵³¹ is an apocalyptic number.

605531 is a deficient number, since it is larger than the sum of its proper divisors (1).

605531 is an equidigital number, since it uses as much as digits as its factorization.

605531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 605531 is about 778.1587241688. The cubic root of 605531 is about 84.6016423328.

The spelling of 605531 in words is "six hundred five thousand, five hundred thirty-one".