211404142 has 8 divisors (see below), whose sum is σ = 328041000. Its totient is φ = 102057144.

The previous prime is 211404107. The next prime is 211404173. The reversal of 211404142 is 241404112.

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

It is a super-2 number, since 2×211404142² = 89383422509512328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822392 + ... + 1822507.

It is an arithmetic number, because the mean of its divisors is an integer number (41005125).

Almost surely, 2^211404142 is an apocalyptic number.

211404142 is a deficient number, since it is larger than the sum of its proper divisors (116636858).

211404142 is a wasteful number, since it uses less digits than its factorization.

211404142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644930.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 211404142 is about 14539.7435328138. The cubic root of 211404142 is about 595.7140329695.

Adding to 211404142 its reverse (241404112), we get a palindrome (452808254).

The spelling of 211404142 in words is "two hundred eleven million, four hundred four thousand, one hundred forty-two".