542187181 has 2 divisors, whose sum is σ = 542187182. Its totient is φ = 542187180.

The previous prime is 542187109. The next prime is 542187187. The reversal of 542187181 is 181781245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525097225 + 17089956 = 22915^2 + 4134^2 .

It is a cyclic number.

It is not a de Polignac number, because 542187181 - 2⁷ = 542187053 is a prime.

It is a super-2 number, since 2×542187181² = 587933878481453522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542187181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542187187) 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, 271093590 + 271093591.

It is an arithmetic number, because the mean of its divisors is an integer number (271093591).

Almost surely, 2^542187181 is an apocalyptic number.

It is an amenable number.

542187181 is a deficient number, since it is larger than the sum of its proper divisors (1).

542187181 is an equidigital number, since it uses as much as digits as its factorization.

542187181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 37.

The square root of 542187181 is about 23284.9131628185. The cubic root of 542187181 is about 815.4232340740.

The spelling of 542187181 in words is "five hundred forty-two million, one hundred eighty-seven thousand, one hundred eighty-one".