55540022257 has 2 divisors, whose sum is σ = 55540022258. Its totient is φ = 55540022256.

The previous prime is 55540022221. The next prime is 55540022327. The reversal of 55540022257 is 75222004555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52214078016 + 3325944241 = 228504^2 + 57671^2 .

It is a cyclic number.

It is not a de Polignac number, because 55540022257 - 2⁷ = 55540022129 is a prime.

It is not a weakly prime, because it can be changed into another prime (55540022207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27770011128 + 27770011129.

It is an arithmetic number, because the mean of its divisors is an integer number (27770011129).

Almost surely, 2^55540022257 is an apocalyptic number.

It is an amenable number.

55540022257 is a deficient number, since it is larger than the sum of its proper divisors (1).

55540022257 is an equidigital number, since it uses as much as digits as its factorization.

55540022257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140000, while the sum is 37.

The spelling of 55540022257 in words is "fifty-five billion, five hundred forty million, twenty-two thousand, two hundred fifty-seven".