212143001 has 6 divisors (see below), whose sum is σ = 246778650. Its totient is φ = 181836816.

The previous prime is 212142989. The next prime is 212143003. The reversal of 212143001 is 100341212.

It can be written as a sum of positive squares in only one way, i.e., 207936400 + 4206601 = 14420^2 + 2051^2 .

It is a de Polignac number, because none of the positive numbers 2^k-212143001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212143003) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2164676 + ... + 2164773.

It is an arithmetic number, because the mean of its divisors is an integer number (41129775).

Almost surely, 2^212143001 is an apocalyptic number.

It is an amenable number.

212143001 is a deficient number, since it is larger than the sum of its proper divisors (34635649).

212143001 is an equidigital number, since it uses as much as digits as its factorization.

212143001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329463 (or 4329456 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212143001 is about 14565.1296252385. The cubic root of 212143001 is about 596.4072342940.

Adding to 212143001 its reverse (100341212), we get a palindrome (312484213).

The spelling of 212143001 in words is "two hundred twelve million, one hundred forty-three thousand, one".