56531983 has 2 divisors, whose sum is σ = 56531984. Its totient is φ = 56531982.

The previous prime is 56531963. The next prime is 56532013. The reversal of 56531983 is 38913565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56531983 - 2⁹ = 56531471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56531963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28265991 + 28265992.

It is an arithmetic number, because the mean of its divisors is an integer number (28265992).

Almost surely, 2^56531983 is an apocalyptic number.

56531983 is a deficient number, since it is larger than the sum of its proper divisors (1).

56531983 is an equidigital number, since it uses as much as digits as its factorization.

56531983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 40.

The square root of 56531983 is about 7518.7753657095. The cubic root of 56531983 is about 383.7939047971.

The spelling of 56531983 in words is "fifty-six million, five hundred thirty-one thousand, nine hundred eighty-three".