55271243 has 2 divisors, whose sum is σ = 55271244. Its totient is φ = 55271242.

The previous prime is 55271213. The next prime is 55271261. The reversal of 55271243 is 34217255.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55271243 - 2⁶ = 55271179 is a prime.

It is not a weakly prime, because it can be changed into another prime (55271213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27635621 + 27635622.

It is an arithmetic number, because the mean of its divisors is an integer number (27635622).

Almost surely, 2^55271243 is an apocalyptic number.

55271243 is a deficient number, since it is larger than the sum of its proper divisors (1).

55271243 is an equidigital number, since it uses as much as digits as its factorization.

55271243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 55271243 is about 7434.4631951473. The cubic root of 55271243 is about 380.9193873764.

Adding to 55271243 its reverse (34217255), we get a palindrome (89488498).

The spelling of 55271243 in words is "fifty-five million, two hundred seventy-one thousand, two hundred forty-three".