212843523 has 16 divisors (see below), whose sum is σ = 290606976. Its totient is φ = 138526080.

The previous prime is 212843509. The next prime is 212843563. The reversal of 212843523 is 325348212.

It is not a de Polignac number, because 212843523 - 2¹³ = 212835331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212843563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18028 + ... + 27398.

It is an arithmetic number, because the mean of its divisors is an integer number (18162936).

Almost surely, 2^212843523 is an apocalyptic number.

212843523 is a deficient number, since it is larger than the sum of its proper divisors (77763453).

212843523 is a wasteful number, since it uses less digits than its factorization.

212843523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554.

The product of its digits is 11520, while the sum is 30.

The square root of 212843523 is about 14589.1577207185. The cubic root of 212843523 is about 597.0629827858.

The spelling of 212843523 in words is "two hundred twelve million, eight hundred forty-three thousand, five hundred twenty-three".