211420227 has 4 divisors (see below), whose sum is σ = 281893640. Its totient is φ = 140946816.

The previous prime is 211420219. The next prime is 211420229. The reversal of 211420227 is 722024112.

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

It is not a de Polignac number, because 211420227 - 2³ = 211420219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211420229) 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, 35236702 + ... + 35236707.

It is an arithmetic number, because the mean of its divisors is an integer number (70473410).

Almost surely, 2^211420227 is an apocalyptic number.

211420227 is a deficient number, since it is larger than the sum of its proper divisors (70473413).

211420227 is an equidigital number, since it uses as much as digits as its factorization.

211420227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70473412.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 211420227 is about 14540.2966613477. The cubic root of 211420227 is about 595.7291411837.

Adding to 211420227 its reverse (722024112), we get a palindrome (933444339).

The spelling of 211420227 in words is "two hundred eleven million, four hundred twenty thousand, two hundred twenty-seven".