401440211 has 4 divisors (see below), whose sum is σ = 402499800. Its totient is φ = 400380624.

The previous prime is 401440163. The next prime is 401440279. The reversal of 401440211 is 112044104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401440211 - 2⁶ = 401440147 is a prime.

It is a super-2 number, since 2×401440211² = 322308486015449042, which contains 22 as substring.

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 401440211.

It is not an unprimeable number, because it can be changed into a prime (401440411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529226 + ... + 529983.

It is an arithmetic number, because the mean of its divisors is an integer number (100624950).

Almost surely, 2^401440211 is an apocalyptic number.

401440211 is a deficient number, since it is larger than the sum of its proper divisors (1059589).

401440211 is a wasteful number, since it uses less digits than its factorization.

401440211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059588.

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

The square root of 401440211 is about 20035.9729237190. The cubic root of 401440211 is about 737.6895376487.

Adding to 401440211 its reverse (112044104), we get a palindrome (513484315).

The spelling of 401440211 in words is "four hundred one million, four hundred forty thousand, two hundred eleven".