212542436 has 12 divisors (see below), whose sum is σ = 391525680. Its totient is φ = 100677960.

The previous prime is 212542411. The next prime is 212542439. The reversal of 212542436 is 634245212.

212542436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 212542399 and 212542408.

It is not an unprimeable number, because it can be changed into a prime (212542439) 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, 1398230 + ... + 1398381.

It is an arithmetic number, because the mean of its divisors is an integer number (32627140).

Almost surely, 2^212542436 is an apocalyptic number.

It is an amenable number.

212542436 is a deficient number, since it is larger than the sum of its proper divisors (178983244).

212542436 is a wasteful number, since it uses less digits than its factorization.

212542436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796634 (or 2796632 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 212542436 is about 14578.8352072448. The cubic root of 212542436 is about 596.7813161846.

Adding to 212542436 its reverse (634245212), we get a palindrome (846787648).

The spelling of 212542436 in words is "two hundred twelve million, five hundred forty-two thousand, four hundred thirty-six".