542052509 has 2 divisors, whose sum is σ = 542052510. Its totient is φ = 542052508.

The previous prime is 542052493. The next prime is 542052541. The reversal of 542052509 is 905250245.

It is an a-pointer prime, because the next prime (542052541) can be obtained adding 542052509 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534626884 + 7425625 = 23122^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 542052509 - 2⁴ = 542052493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542052209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271026254 + 271026255.

It is an arithmetic number, because the mean of its divisors is an integer number (271026255).

Almost surely, 2^542052509 is an apocalyptic number.

It is an amenable number.

542052509 is a deficient number, since it is larger than the sum of its proper divisors (1).

542052509 is an equidigital number, since it uses as much as digits as its factorization.

542052509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 542052509 is about 23282.0211536713. The cubic root of 542052509 is about 815.3557150972.

The spelling of 542052509 in words is "five hundred forty-two million, fifty-two thousand, five hundred nine".