211232401 has 8 divisors (see below), whose sum is σ = 215455464. Its totient is φ = 207018240.

The previous prime is 211232393. The next prime is 211232407. The reversal of 211232401 is 104232112.

It can be written as a sum of positive squares in 4 ways, for example, as 8910225 + 202322176 = 2985^2 + 14224^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211232401 - 2³ = 211232393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211232407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66121 + ... + 69241.

It is an arithmetic number, because the mean of its divisors is an integer number (26931933).

Almost surely, 2^211232401 is an apocalyptic number.

It is an amenable number.

211232401 is a deficient number, since it is larger than the sum of its proper divisors (4223063).

211232401 is a wasteful number, since it uses less digits than its factorization.

211232401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 211232401 is about 14533.8364171336. The cubic root of 211232401 is about 595.5526734051.

Adding to 211232401 its reverse (104232112), we get a palindrome (315464513).

The spelling of 211232401 in words is "two hundred eleven million, two hundred thirty-two thousand, four hundred one".