542550161 has 2 divisors, whose sum is σ = 542550162. Its totient is φ = 542550160.

The previous prime is 542550137. The next prime is 542550163. The reversal of 542550161 is 161055245.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442849936 + 99700225 = 21044^2 + 9985^2 .

It is a cyclic number.

It is not a de Polignac number, because 542550161 - 2²⁶ = 475441297 is a prime.

It is a super-2 number, since 2×542550161² = 588721354402251842, which contains 22 as substring.

Together with 542550163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (542550163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271275080 + 271275081.

It is an arithmetic number, because the mean of its divisors is an integer number (271275081).

Almost surely, 2^542550161 is an apocalyptic number.

It is an amenable number.

542550161 is a deficient number, since it is larger than the sum of its proper divisors (1).

542550161 is an equidigital number, since it uses as much as digits as its factorization.

542550161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 542550161 is about 23292.7061759685. The cubic root of 542550161 is about 815.6051615889.

The spelling of 542550161 in words is "five hundred forty-two million, five hundred fifty thousand, one hundred sixty-one".