55372243 has 2 divisors, whose sum is σ = 55372244. Its totient is φ = 55372242.

The previous prime is 55372199. The next prime is 55372253. The reversal of 55372243 is 34227355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55372243 - 2¹³ = 55364051 is a prime.

It is not a weakly prime, because it can be changed into another prime (55372253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27686121 + 27686122.

It is an arithmetic number, because the mean of its divisors is an integer number (27686122).

Almost surely, 2^55372243 is an apocalyptic number.

55372243 is a deficient number, since it is larger than the sum of its proper divisors (1).

55372243 is an equidigital number, since it uses as much as digits as its factorization.

55372243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 31.

The square root of 55372243 is about 7441.2527843099. The cubic root of 55372243 is about 381.1512707533.

Adding to 55372243 its reverse (34227355), we get a palindrome (89599598).

The spelling of 55372243 in words is "fifty-five million, three hundred seventy-two thousand, two hundred forty-three".