1021544081 has 2 divisors, whose sum is σ = 1021544082. Its totient is φ = 1021544080.

The previous prime is 1021544033. The next prime is 1021544089. The reversal of 1021544081 is 1804451201.

1021544081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533841025 + 487703056 = 23105^2 + 22084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021544081 - 2¹⁰ = 1021543057 is a prime.

It is a super-2 number, since 2×1021544081² = 2087104618852269122, 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 1021544081.

It is not a weakly prime, because it can be changed into another prime (1021544089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510772040 + 510772041.

It is an arithmetic number, because the mean of its divisors is an integer number (510772041).

Almost surely, 2^1021544081 is an apocalyptic number.

It is an amenable number.

1021544081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021544081 is an equidigital number, since it uses as much as digits as its factorization.

1021544081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 1021544081 is about 31961.6032295002. The cubic root of 1021544081 is about 1007.1303969304.

Adding to 1021544081 its reverse (1804451201), we get a palindrome (2825995282).

The spelling of 1021544081 in words is "one billion, twenty-one million, five hundred forty-four thousand, eighty-one".