212542442 has 32 divisors (see below), whose sum is σ = 374613120. Its totient is φ = 88542720.

The previous prime is 212542439. The next prime is 212542453. The reversal of 212542442 is 244245212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217058 + ... + 218034.

It is an arithmetic number, because the mean of its divisors is an integer number (11706660).

Almost surely, 2^212542442 is an apocalyptic number.

212542442 is a deficient number, since it is larger than the sum of its proper divisors (162070678).

212542442 is a wasteful number, since it uses less digits than its factorization.

212542442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406.

The product of its digits is 5120, while the sum is 26.

The square root of 212542442 is about 14578.8354130225. The cubic root of 212542442 is about 596.7813218003.

Adding to 212542442 its reverse (244245212), we get a palindrome (456787654).

The spelling of 212542442 in words is "two hundred twelve million, five hundred forty-two thousand, four hundred forty-two".