2042531081 has 2 divisors, whose sum is σ = 2042531082. Its totient is φ = 2042531080.

The previous prime is 2042531041. The next prime is 2042531087. The reversal of 2042531081 is 1801352402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1768959481 + 273571600 = 42059^2 + 16540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042531081 - 2¹⁸ = 2042268937 is a prime.

It is a super-2 number, since 2×2042531081² = 8343866433702057122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2042531081.

It is not a weakly prime, because it can be changed into another prime (2042531087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021265540 + 1021265541.

It is an arithmetic number, because the mean of its divisors is an integer number (1021265541).

Almost surely, 2^2042531081 is an apocalyptic number.

It is an amenable number.

2042531081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042531081 is an equidigital number, since it uses as much as digits as its factorization.

2042531081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2042531081 is about 45194.3700144166. The cubic root of 2042531081 is about 1268.7894474667.

Adding to 2042531081 its reverse (1801352402), we get a palindrome (3843883483).

The spelling of 2042531081 in words is "two billion, forty-two million, five hundred thirty-one thousand, eighty-one".