542215517 has 2 divisors, whose sum is σ = 542215518. Its totient is φ = 542215516.

The previous prime is 542215507. The next prime is 542215601. The reversal of 542215517 is 715512245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 433514041 + 108701476 = 20821^2 + 10426^2 .

It is a cyclic number.

It is not a de Polignac number, because 542215517 - 2¹⁰ = 542214493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542215507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271107758 + 271107759.

It is an arithmetic number, because the mean of its divisors is an integer number (271107759).

Almost surely, 2^542215517 is an apocalyptic number.

It is an amenable number.

542215517 is a deficient number, since it is larger than the sum of its proper divisors (1).

542215517 is an equidigital number, since it uses as much as digits as its factorization.

542215517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14000, while the sum is 32.

The square root of 542215517 is about 23285.5216175202. The cubic root of 542215517 is about 815.4374391500.

The spelling of 542215517 in words is "five hundred forty-two million, two hundred fifteen thousand, five hundred seventeen".