211330401 has 16 divisors (see below), whose sum is σ = 286639296. Its totient is φ = 138468096.

The previous prime is 211330387. The next prime is 211330403. The reversal of 211330401 is 104033112.

It is not a de Polignac number, because 211330401 - 2⁹ = 211329889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211330403) 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, 67006 + ... + 70088.

It is an arithmetic number, because the mean of its divisors is an integer number (17914956).

Almost surely, 2^211330401 is an apocalyptic number.

It is an amenable number.

211330401 is a deficient number, since it is larger than the sum of its proper divisors (75308895).

211330401 is a wasteful number, since it uses less digits than its factorization.

211330401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 211330401 is about 14537.2074691118. The cubic root of 211330401 is about 595.6447601906.

Adding to 211330401 its reverse (104033112), we get a palindrome (315363513).

The spelling of 211330401 in words is "two hundred eleven million, three hundred thirty thousand, four hundred one".