212543045 has 16 divisors (see below), whose sum is σ = 299642112. Its totient is φ = 142685760.

The previous prime is 212542999. The next prime is 212543047. The reversal of 212543045 is 540345212.

It is a happy number.

It is not a de Polignac number, because 212543045 - 2¹⁰ = 212542021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212543047) 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 15 ways as a sum of consecutive naturals, for example, 147917 + ... + 149346.

It is an arithmetic number, because the mean of its divisors is an integer number (18727632).

Almost surely, 2^212543045 is an apocalyptic number.

It is an amenable number.

212543045 is a deficient number, since it is larger than the sum of its proper divisors (87099067).

212543045 is a wasteful number, since it uses less digits than its factorization.

212543045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297292.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 212543045 is about 14578.8560936721. The cubic root of 212543045 is about 596.7818861720.

Adding to 212543045 its reverse (540345212), we get a palindrome (752888257).

The spelling of 212543045 in words is "two hundred twelve million, five hundred forty-three thousand, forty-five".