556139731 has 16 divisors (see below), whose sum is σ = 650223616. Its totient is φ = 465829056.

The previous prime is 556139707. The next prime is 556139741. The reversal of 556139731 is 137931655.

It is a happy number.

It is not a de Polignac number, because 556139731 - 2¹⁷ = 556008659 is a prime.

It is a super-2 number, since 2×556139731² = 618582800793504722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (556139741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54895 + ... + 64231.

It is an arithmetic number, because the mean of its divisors is an integer number (40638976).

Almost surely, 2^556139731 is an apocalyptic number.

556139731 is a deficient number, since it is larger than the sum of its proper divisors (94083885).

556139731 is a wasteful number, since it uses less digits than its factorization.

556139731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9538.

The product of its digits is 85050, while the sum is 40.

The square root of 556139731 is about 23582.6150161512. The cubic root of 556139731 is about 822.3587306147.

The spelling of 556139731 in words is "five hundred fifty-six million, one hundred thirty-nine thousand, seven hundred thirty-one".