55250220001 has 2 divisors, whose sum is σ = 55250220002. Its totient is φ = 55250220000.

The previous prime is 55250219989. The next prime is 55250220019. The reversal of 55250220001 is 10002205255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38249971776 + 17000248225 = 195576^2 + 130385^2 .

It is a cyclic number.

It is not a de Polignac number, because 55250220001 - 2⁷ = 55250219873 is a prime.

It is not a weakly prime, because it can be changed into another prime (55250220041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27625110000 + 27625110001.

It is an arithmetic number, because the mean of its divisors is an integer number (27625110001).

Almost surely, 2^55250220001 is an apocalyptic number.

It is an amenable number.

55250220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

55250220001 is an equidigital number, since it uses as much as digits as its factorization.

55250220001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 22.

Adding to 55250220001 its reverse (10002205255), we get a palindrome (65252425256).

The spelling of 55250220001 in words is "fifty-five billion, two hundred fifty million, two hundred twenty thousand, one".