55445317 has 2 divisors, whose sum is σ = 55445318. Its totient is φ = 55445316.

The previous prime is 55445311. The next prime is 55445321. The reversal of 55445317 is 71354455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55442916 + 2401 = 7446^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 55445317 - 2¹⁹ = 54921029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55445311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722658 + 27722659.

It is an arithmetic number, because the mean of its divisors is an integer number (27722659).

Almost surely, 2^55445317 is an apocalyptic number.

It is an amenable number.

55445317 is a deficient number, since it is larger than the sum of its proper divisors (1).

55445317 is an equidigital number, since it uses as much as digits as its factorization.

55445317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 34.

The square root of 55445317 is about 7446.1612257592. The cubic root of 55445317 is about 381.3188637767.

The spelling of 55445317 in words is "fifty-five million, four hundred forty-five thousand, three hundred seventeen".