211143442 has 8 divisors (see below), whose sum is σ = 319133232. Its totient is φ = 104765700.

The previous prime is 211143431. The next prime is 211143463. The reversal of 211143442 is 244341112.

It is a happy number.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 402684 + ... + 403207.

It is an arithmetic number, because the mean of its divisors is an integer number (39891654).

Almost surely, 2^211143442 is an apocalyptic number.

211143442 is a deficient number, since it is larger than the sum of its proper divisors (107989790).

211143442 is a wasteful number, since it uses less digits than its factorization.

211143442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806024.

The product of its digits is 768, while the sum is 22.

The square root of 211143442 is about 14530.7756847320. The cubic root of 211143442 is about 595.4690574303.

Adding to 211143442 its reverse (244341112), we get a palindrome (455484554).

The spelling of 211143442 in words is "two hundred eleven million, one hundred forty-three thousand, four hundred forty-two".