6556538531 has 2 divisors, whose sum is σ = 6556538532. Its totient is φ = 6556538530.

The previous prime is 6556538519. The next prime is 6556538537. The reversal of 6556538531 is 1358356556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6556538531 - 2¹⁸ = 6556276387 is a prime.

It is a super-2 number, since 2×6556538531² = 85976395016975275922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6556538537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278269265 + 3278269266.

It is an arithmetic number, because the mean of its divisors is an integer number (3278269266).

Almost surely, 2^6556538531 is an apocalyptic number.

6556538531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6556538531 is an equidigital number, since it uses as much as digits as its factorization.

6556538531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620000, while the sum is 47.

The square root of 6556538531 is about 80972.4553845318. The cubic root of 6556538531 is about 1871.6510084741.

The spelling of 6556538531 in words is "six billion, five hundred fifty-six million, five hundred thirty-eight thousand, five hundred thirty-one".