5540531281 has 2 divisors, whose sum is σ = 5540531282. Its totient is φ = 5540531280.

The previous prime is 5540531261. The next prime is 5540531323. The reversal of 5540531281 is 1821350455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5197689025 + 342842256 = 72095^2 + 18516^2 .

It is a cyclic number.

It is not a de Polignac number, because 5540531281 - 2³¹ = 3393047633 is a prime.

It is a super-2 number, since 2×5540531281² = 61394973751479001922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5540531261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2770265640 + 2770265641.

It is an arithmetic number, because the mean of its divisors is an integer number (2770265641).

Almost surely, 2^5540531281 is an apocalyptic number.

It is an amenable number.

5540531281 is a deficient number, since it is larger than the sum of its proper divisors (1).

5540531281 is an equidigital number, since it uses as much as digits as its factorization.

5540531281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 5540531281 is about 74434.7451194669. The cubic root of 5540531281 is about 1769.4996064918.

The spelling of 5540531281 in words is "five billion, five hundred forty million, five hundred thirty-one thousand, two hundred eighty-one".