212965243 has 4 divisors (see below), whose sum is σ = 224173960. Its totient is φ = 201756528.

The previous prime is 212965237. The next prime is 212965297. The reversal of 212965243 is 342569212.

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

It is a cyclic number.

It is not a de Polignac number, because 212965243 - 2¹³ = 212957051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212965199 and 212965208.

It is not an unprimeable number, because it can be changed into a prime (212965843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5604330 + ... + 5604367.

It is an arithmetic number, because the mean of its divisors is an integer number (56043490).

Almost surely, 2^212965243 is an apocalyptic number.

212965243 is a deficient number, since it is larger than the sum of its proper divisors (11208717).

212965243 is a wasteful number, since it uses less digits than its factorization.

212965243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11208716.

The product of its digits is 25920, while the sum is 34.

The square root of 212965243 is about 14593.3287155467. The cubic root of 212965243 is about 597.1767763309.

The spelling of 212965243 in words is "two hundred twelve million, nine hundred sixty-five thousand, two hundred forty-three".