211712142 has 8 divisors (see below), whose sum is σ = 423424296. Its totient is φ = 70570712.

The previous prime is 211712141. The next prime is 211712143. The reversal of 211712142 is 241217112.

It is an interprime number because it is at equal distance from previous prime (211712141) and next prime (211712143).

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

211712142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211712141) 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, 17642673 + ... + 17642684.

It is an arithmetic number, because the mean of its divisors is an integer number (52928037).

Almost surely, 2^211712142 is an apocalyptic number.

211712142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211712142 is a wasteful number, since it uses less digits than its factorization.

211712142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35285362.

The product of its digits is 224, while the sum is 21.

The square root of 211712142 is about 14550.3313364335. The cubic root of 211712142 is about 596.0031961602.

Adding to 211712142 its reverse (241217112), we get a palindrome (452929254).

The spelling of 211712142 in words is "two hundred eleven million, seven hundred twelve thousand, one hundred forty-two".