542445557 has 2 divisors, whose sum is σ = 542445558. Its totient is φ = 542445556.

The previous prime is 542445523. The next prime is 542445577. The reversal of 542445557 is 755544245.

542445557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295358596 + 247086961 = 17186^2 + 15719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542445557 is a prime.

It is equal to p_28469921 and since 542445557 and 28469921 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542445577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271222778 + 271222779.

It is an arithmetic number, because the mean of its divisors is an integer number (271222779).

Almost surely, 2^542445557 is an apocalyptic number.

It is an amenable number.

542445557 is a deficient number, since it is larger than the sum of its proper divisors (1).

542445557 is an equidigital number, since it uses as much as digits as its factorization.

542445557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560000, while the sum is 41.

The square root of 542445557 is about 23290.4606437915. The cubic root of 542445557 is about 815.5527418300.

The spelling of 542445557 in words is "five hundred forty-two million, four hundred forty-five thousand, five hundred fifty-seven".