55288361 has 2 divisors, whose sum is σ = 55288362. Its totient is φ = 55288360.

The previous prime is 55288357. The next prime is 55288367. The reversal of 55288361 is 16388255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29593600 + 25694761 = 5440^2 + 5069^2 .

It is a cyclic number.

It is not a de Polignac number, because 55288361 - 2² = 55288357 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 (55288367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27644180 + 27644181.

It is an arithmetic number, because the mean of its divisors is an integer number (27644181).

Almost surely, 2^55288361 is an apocalyptic number.

It is an amenable number.

55288361 is a deficient number, since it is larger than the sum of its proper divisors (1).

55288361 is an equidigital number, since it uses as much as digits as its factorization.

55288361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 38.

The square root of 55288361 is about 7435.6143660090. The cubic root of 55288361 is about 380.9587080350.

The spelling of 55288361 in words is "fifty-five million, two hundred eighty-eight thousand, three hundred sixty-one".