55718249 has 2 divisors, whose sum is σ = 55718250. Its totient is φ = 55718248.

The previous prime is 55718207. The next prime is 55718261. The reversal of 55718249 is 94281755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44462224 + 11256025 = 6668^2 + 3355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55718249 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55715249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27859124 + 27859125.

It is an arithmetic number, because the mean of its divisors is an integer number (27859125).

Almost surely, 2^55718249 is an apocalyptic number.

It is an amenable number.

55718249 is a deficient number, since it is larger than the sum of its proper divisors (1).

55718249 is an equidigital number, since it uses as much as digits as its factorization.

55718249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 55718249 is about 7464.4657544931. The cubic root of 55718249 is about 381.9435261854.

The spelling of 55718249 in words is "fifty-five million, seven hundred eighteen thousand, two hundred forty-nine".