55288817 has 2 divisors, whose sum is σ = 55288818. Its totient is φ = 55288816.

The previous prime is 55288799. The next prime is 55288823. The reversal of 55288817 is 71888255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30924721 + 24364096 = 5561^2 + 4936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55288817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55288867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27644408 + 27644409.

It is an arithmetic number, because the mean of its divisors is an integer number (27644409).

Almost surely, 2^55288817 is an apocalyptic number.

It is an amenable number.

55288817 is a deficient number, since it is larger than the sum of its proper divisors (1).

55288817 is an equidigital number, since it uses as much as digits as its factorization.

55288817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 179200, while the sum is 44.

The square root of 55288817 is about 7435.6450291821. The cubic root of 55288817 is about 380.9597553724.

The spelling of 55288817 in words is "fifty-five million, two hundred eighty-eight thousand, eight hundred seventeen".