211438005 has 32 divisors (see below), whose sum is σ = 346273920. Its totient is φ = 110135040.

The previous prime is 211438001. The next prime is 211438013. The reversal of 211438005 is 500834112.

211438005 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 211438005 - 2² = 211438001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211438001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152415 + ... + 153795.

It is an arithmetic number, because the mean of its divisors is an integer number (10821060).

Almost surely, 2^211438005 is an apocalyptic number.

It is an amenable number.

211438005 is a deficient number, since it is larger than the sum of its proper divisors (134835915).

211438005 is a wasteful number, since it uses less digits than its factorization.

211438005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 211438005 is about 14540.9079840291. The cubic root of 211438005 is about 595.7458386965.

The spelling of 211438005 in words is "two hundred eleven million, four hundred thirty-eight thousand, five".