212745243 has 4 divisors (see below), whose sum is σ = 283660328. Its totient is φ = 141830160.

The previous prime is 212745241. The next prime is 212745263. The reversal of 212745243 is 342547212.

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

It is not a de Polignac number, because 212745243 - 2¹ = 212745241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212745243.

It is not an unprimeable number, because it can be changed into a prime (212745241) 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, 35457538 + ... + 35457543.

It is an arithmetic number, because the mean of its divisors is an integer number (70915082).

Almost surely, 2^212745243 is an apocalyptic number.

212745243 is a deficient number, since it is larger than the sum of its proper divisors (70915085).

212745243 is an equidigital number, since it uses as much as digits as its factorization.

212745243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70915084.

The product of its digits is 13440, while the sum is 30.

The square root of 212745243 is about 14585.7890770434. The cubic root of 212745243 is about 596.9710711581.

The spelling of 212745243 in words is "two hundred twelve million, seven hundred forty-five thousand, two hundred forty-three".