211140142 has 8 divisors (see below), whose sum is σ = 317547000. Its totient is φ = 105291144.

The previous prime is 211140133. The next prime is 211140143. The reversal of 211140142 is 241041112.

It is a happy number.

211140142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211140143) 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, 138517 + ... + 140032.

It is an arithmetic number, because the mean of its divisors is an integer number (39693375).

Almost surely, 2^211140142 is an apocalyptic number.

211140142 is a deficient number, since it is larger than the sum of its proper divisors (106406858).

211140142 is a wasteful number, since it uses less digits than its factorization.

211140142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278930.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 211140142 is about 14530.6621321948. The cubic root of 211140142 is about 595.4659551820.

Adding to 211140142 its reverse (241041112), we get a palindrome (452181254).

The spelling of 211140142 in words is "two hundred eleven million, one hundred forty thousand, one hundred forty-two".