212143741 has 4 divisors (see below), whose sum is σ = 212274972. Its totient is φ = 212012512.

The previous prime is 212143709. The next prime is 212143747. The reversal of 212143741 is 147341212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21427641 + 190716100 = 4629^2 + 13810^2 .

It is a cyclic number.

It is not a de Polignac number, because 212143741 - 2⁵ = 212143709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212143747) 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, 63160 + ... + 66433.

It is an arithmetic number, because the mean of its divisors is an integer number (53068743).

Almost surely, 2^212143741 is an apocalyptic number.

It is an amenable number.

212143741 is a deficient number, since it is larger than the sum of its proper divisors (131231).

212143741 is a wasteful number, since it uses less digits than its factorization.

212143741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131230.

The product of its digits is 1344, while the sum is 25.

The square root of 212143741 is about 14565.1550283545. The cubic root of 212143741 is about 596.4079277584.

Adding to 212143741 its reverse (147341212), we get a palindrome (359484953).

The spelling of 212143741 in words is "two hundred twelve million, one hundred forty-three thousand, seven hundred forty-one".