542551109 has 2 divisors, whose sum is σ = 542551110. Its totient is φ = 542551108.

The previous prime is 542551069. The next prime is 542551133. The reversal of 542551109 is 901155245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534626884 + 7924225 = 23122^2 + 2815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542551109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542551189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271275554 + 271275555.

It is an arithmetic number, because the mean of its divisors is an integer number (271275555).

Almost surely, 2^542551109 is an apocalyptic number.

It is an amenable number.

542551109 is a deficient number, since it is larger than the sum of its proper divisors (1).

542551109 is an equidigital number, since it uses as much as digits as its factorization.

542551109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 542551109 is about 23292.7265256775. The cubic root of 542551109 is about 815.6056366253.

The spelling of 542551109 in words is "five hundred forty-two million, five hundred fifty-one thousand, one hundred nine".