211242401 has 8 divisors (see below), whose sum is σ = 219450624. Its totient is φ = 203121360.

The previous prime is 211242397. The next prime is 211242403. The reversal of 211242401 is 104242112.

211242401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211242401 - 2² = 211242397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211242401.

It is not an unprimeable number, because it can be changed into a prime (211242403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16835 + ... + 26568.

It is an arithmetic number, because the mean of its divisors is an integer number (27431328).

Almost surely, 2^211242401 is an apocalyptic number.

It is an amenable number.

211242401 is a deficient number, since it is larger than the sum of its proper divisors (8208223).

211242401 is a wasteful number, since it uses less digits than its factorization.

211242401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43591.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 211242401 is about 14534.1804378506. The cubic root of 211242401 is about 595.5620713206.

Adding to 211242401 its reverse (104242112), we get a palindrome (315484513).

The spelling of 211242401 in words is "two hundred eleven million, two hundred forty-two thousand, four hundred one".