211143401 has 6 divisors (see below), whose sum is σ = 245615850. Its totient is φ = 180980016.

The previous prime is 211143397. The next prime is 211143407. The reversal of 211143401 is 104341112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 178195801 + 32947600 = 13349^2 + 5740^2 .

It is not a de Polignac number, because 211143401 - 2² = 211143397 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 211143401.

It is not an unprimeable number, because it can be changed into a prime (211143407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2154476 + ... + 2154573.

It is an arithmetic number, because the mean of its divisors is an integer number (40935975).

Almost surely, 2^211143401 is an apocalyptic number.

It is an amenable number.

211143401 is a deficient number, since it is larger than the sum of its proper divisors (34472449).

211143401 is an equidigital number, since it uses as much as digits as its factorization.

211143401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309063 (or 4309056 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 211143401 is about 14530.7742739332. The cubic root of 211143401 is about 595.4690188874.

Adding to 211143401 its reverse (104341112), we get a palindrome (315484513).

The spelling of 211143401 in words is "two hundred eleven million, one hundred forty-three thousand, four hundred one".