556331131 has 2 divisors, whose sum is σ = 556331132. Its totient is φ = 556331130.

The previous prime is 556331117. The next prime is 556331141. The reversal of 556331131 is 131133655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556331131 - 2¹⁷ = 556200059 is a prime.

It is a super-2 number, since 2×556331131² = 619008654639478322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556331131.

It is not a weakly prime, because it can be changed into another prime (556331101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278165565 + 278165566.

It is an arithmetic number, because the mean of its divisors is an integer number (278165566).

Almost surely, 2^556331131 is an apocalyptic number.

556331131 is a deficient number, since it is larger than the sum of its proper divisors (1).

556331131 is an equidigital number, since it uses as much as digits as its factorization.

556331131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 28.

The square root of 556331131 is about 23586.6727411901. The cubic root of 556331131 is about 822.4530602703.

Adding to 556331131 its reverse (131133655), we get a palindrome (687464786).

The spelling of 556331131 in words is "five hundred fifty-six million, three hundred thirty-one thousand, one hundred thirty-one".