211228272173 has 4 divisors (see below), whose sum is σ = 211229806080. Its totient is φ = 211226738268.

The previous prime is 211228272169. The next prime is 211228272181. The reversal of 211228272173 is 371272822112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211228272173 - 2² = 211228272169 is a prime.

It is a super-2 number, since 2×211228272173² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211228262173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537515 + ... + 843432.

It is an arithmetic number, because the mean of its divisors is an integer number (52807451520).

Almost surely, 2^211228272173 is an apocalyptic number.

It is an amenable number.

211228272173 is a deficient number, since it is larger than the sum of its proper divisors (1533907).

211228272173 is a wasteful number, since it uses less digits than its factorization.

211228272173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533906.

The product of its digits is 37632, while the sum is 38.

The spelling of 211228272173 in words is "two hundred eleven billion, two hundred twenty-eight million, two hundred seventy-two thousand, one hundred seventy-three".