531645043 has 2 divisors, whose sum is σ = 531645044. Its totient is φ = 531645042.

The previous prime is 531645041. The next prime is 531645083. The reversal of 531645043 is 340546135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531645043 - 2¹ = 531645041 is a prime.

Together with 531645041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 531644996 and 531645014.

It is not a weakly prime, because it can be changed into another prime (531645041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265822521 + 265822522.

It is an arithmetic number, because the mean of its divisors is an integer number (265822522).

Almost surely, 2^531645043 is an apocalyptic number.

531645043 is a deficient number, since it is larger than the sum of its proper divisors (1).

531645043 is an equidigital number, since it uses as much as digits as its factorization.

531645043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 531645043 is about 23057.4292365823. The cubic root of 531645043 is about 810.1036513194.

The spelling of 531645043 in words is "five hundred thirty-one million, six hundred forty-five thousand, forty-three".