556973731 has 2 divisors, whose sum is σ = 556973732. Its totient is φ = 556973730.

The previous prime is 556973713. The next prime is 556973761. The reversal of 556973731 is 137379655.

556973731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (556973713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556973731 - 2⁷ = 556973603 is a prime.

It is a super-2 number, since 2×556973731² = 620439474048120722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (556973761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278486865 + 278486866.

It is an arithmetic number, because the mean of its divisors is an integer number (278486866).

Almost surely, 2^556973731 is an apocalyptic number.

556973731 is a deficient number, since it is larger than the sum of its proper divisors (1).

556973731 is an equidigital number, since it uses as much as digits as its factorization.

556973731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 595350, while the sum is 46.

The square root of 556973731 is about 23600.2909092240. The cubic root of 556973731 is about 822.7696013552.

The spelling of 556973731 in words is "five hundred fifty-six million, nine hundred seventy-three thousand, seven hundred thirty-one".