211122256 has 20 divisors (see below), whose sum is σ = 410365972. Its totient is φ = 105221376.

The previous prime is 211122251. The next prime is 211122257. The reversal of 211122256 is 652221112.

It can be written as a sum of positive squares in 2 ways, for example, as 14561856 + 196560400 = 3816^2 + 14020^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122251) 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, 16071 + ... + 26086.

Almost surely, 2^211122256 is an apocalyptic number.

It is an amenable number.

211122256 is a deficient number, since it is larger than the sum of its proper divisors (199243716).

211122256 is a wasteful number, since it uses less digits than its factorization.

211122256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42478 (or 42472 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 211122256 is about 14530.0466620035. The cubic root of 211122256 is about 595.4491404340.

Adding to 211122256 its reverse (652221112), we get a palindrome (863343368).

The spelling of 211122256 in words is "two hundred eleven million, one hundred twenty-two thousand, two hundred fifty-six".