211552425055 has 4 divisors (see below), whose sum is σ = 253862910072. Its totient is φ = 169241940040.

The previous prime is 211552425047. The next prime is 211552425067. The reversal of 211552425055 is 550524255112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 211552425055 - 2³ = 211552425047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 21155242501 + ... + 21155242510.

It is an arithmetic number, because the mean of its divisors is an integer number (63465727518).

Almost surely, 2^211552425055 is an apocalyptic number.

211552425055 is a deficient number, since it is larger than the sum of its proper divisors (42310485017).

211552425055 is an equidigital number, since it uses as much as digits as its factorization.

211552425055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42310485016.

The product of its (nonzero) digits is 100000, while the sum is 37.

The spelling of 211552425055 in words is "two hundred eleven billion, five hundred fifty-two million, four hundred twenty-five thousand, fifty-five".