211770655153 has 2 divisors, whose sum is σ = 211770655154. Its totient is φ = 211770655152.

The previous prime is 211770655139. The next prime is 211770655163. The reversal of 211770655153 is 351556077112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121862431744 + 89908223409 = 349088^2 + 299847^2 .

It is a cyclic number.

It is not a de Polignac number, because 211770655153 - 2¹³ = 211770646961 is a prime.

It is not a weakly prime, because it can be changed into another prime (211770655133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105885327576 + 105885327577.

It is an arithmetic number, because the mean of its divisors is an integer number (105885327577).

Almost surely, 2^211770655153 is an apocalyptic number.

It is an amenable number.

211770655153 is a deficient number, since it is larger than the sum of its proper divisors (1).

211770655153 is an equidigital number, since it uses as much as digits as its factorization.

211770655153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 220500, while the sum is 43.

The spelling of 211770655153 in words is "two hundred eleven billion, seven hundred seventy million, six hundred fifty-five thousand, one hundred fifty-three".