54140243 has 2 divisors, whose sum is σ = 54140244. Its totient is φ = 54140242.

The previous prime is 54140239. The next prime is 54140249. The reversal of 54140243 is 34204145.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54140243 - 2² = 54140239 is a prime.

It is not a weakly prime, because it can be changed into another prime (54140249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27070121 + 27070122.

It is an arithmetic number, because the mean of its divisors is an integer number (27070122).

Almost surely, 2^54140243 is an apocalyptic number.

54140243 is a deficient number, since it is larger than the sum of its proper divisors (1).

54140243 is an equidigital number, since it uses as much as digits as its factorization.

54140243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 54140243 is about 7358.0053683046. The cubic root of 54140243 is about 378.3032452714.

Adding to 54140243 its reverse (34204145), we get a palindrome (88344388).

The spelling of 54140243 in words is "fifty-four million, one hundred forty thousand, two hundred forty-three".