211144142 has 16 divisors (see below), whose sum is σ = 346142592. Its totient is φ = 95798520.

The previous prime is 211144133. The next prime is 211144189. The reversal of 211144142 is 241441112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3863 + ... + 20909.

It is an arithmetic number, because the mean of its divisors is an integer number (21633912).

Almost surely, 2^211144142 is an apocalyptic number.

211144142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211144142 is a deficient number, since it is larger than the sum of its proper divisors (134998450).

211144142 is a wasteful number, since it uses less digits than its factorization.

211144142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17623.

The product of its digits is 256, while the sum is 20.

The square root of 211144142 is about 14530.7997715198. The cubic root of 211144142 is about 595.4697154788.

Adding to 211144142 its reverse (241441112), we get a palindrome (452585254).

The spelling of 211144142 in words is "two hundred eleven million, one hundred forty-four thousand, one hundred forty-two".