211442005 has 16 divisors (see below), whose sum is σ = 271275264. Its totient is φ = 157651200.

The previous prime is 211442003. The next prime is 211442009. The reversal of 211442005 is 500244112.

211442005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211442005 - 2¹ = 211442003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211442003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3321 + ... + 20830.

It is an arithmetic number, because the mean of its divisors is an integer number (16954704).

Almost surely, 2^211442005 is an apocalyptic number.

It is an amenable number.

211442005 is a deficient number, since it is larger than the sum of its proper divisors (59833259).

211442005 is a wasteful number, since it uses less digits than its factorization.

211442005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24276.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 211442005 is about 14541.0455263712. The cubic root of 211442005 is about 595.7495954609.

Adding to 211442005 its reverse (500244112), we get a palindrome (711686117).

The spelling of 211442005 in words is "two hundred eleven million, four hundred forty-two thousand, five".