556106081 has 2 divisors, whose sum is σ = 556106082. Its totient is φ = 556106080.

The previous prime is 556106069. The next prime is 556106099. The reversal of 556106081 is 180601655.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 518700625 + 37405456 = 22775^2 + 6116^2 .

It is a cyclic number.

It is not a de Polignac number, because 556106081 - 2¹⁴ = 556089697 is a prime.

It is a super-2 number, since 2×556106081² = 618507946650357122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (556106011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278053040 + 278053041.

It is an arithmetic number, because the mean of its divisors is an integer number (278053041).

Almost surely, 2^556106081 is an apocalyptic number.

It is an amenable number.

556106081 is a deficient number, since it is larger than the sum of its proper divisors (1).

556106081 is an equidigital number, since it uses as much as digits as its factorization.

556106081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 556106081 is about 23581.9015560663. The cubic root of 556106081 is about 822.3421442979.

The spelling of 556106081 in words is "five hundred fifty-six million, one hundred six thousand, eighty-one".