5540243 has 2 divisors, whose sum is σ = 5540244. Its totient is φ = 5540242.

The previous prime is 5540239. The next prime is 5540251. The reversal of 5540243 is 3420455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5540243 - 2² = 5540239 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5540273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2770121 + 2770122.

It is an arithmetic number, because the mean of its divisors is an integer number (2770122).

Almost surely, 2^5540243 is an apocalyptic number.

5540243 is a deficient number, since it is larger than the sum of its proper divisors (1).

5540243 is an equidigital number, since it uses as much as digits as its factorization.

5540243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 5540243 is about 2353.7720790255. The cubic root of 5540243 is about 176.9468916176.

Adding to 5540243 its reverse (3420455), we get a palindrome (8960698).

The spelling of 5540243 in words is "five million, five hundred forty thousand, two hundred forty-three".