55395817 has 2 divisors, whose sum is σ = 55395818. Its totient is φ = 55395816.

The previous prime is 55395761. The next prime is 55395841. The reversal of 55395817 is 71859355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 2702736 = 7259^2 + 1644^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55395817 is a prime.

It is not a weakly prime, because it can be changed into another prime (55395617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27697908 + 27697909.

It is an arithmetic number, because the mean of its divisors is an integer number (27697909).

Almost surely, 2^55395817 is an apocalyptic number.

It is an amenable number.

55395817 is a deficient number, since it is larger than the sum of its proper divisors (1).

55395817 is an equidigital number, since it uses as much as digits as its factorization.

55395817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 43.

The square root of 55395817 is about 7442.8366232237. The cubic root of 55395817 is about 381.2053531163.

The spelling of 55395817 in words is "fifty-five million, three hundred ninety-five thousand, eight hundred seventeen".