212831242 has 8 divisors (see below), whose sum is σ = 343804356. Its totient is φ = 98229792.

The previous prime is 212831221. The next prime is 212831243. The reversal of 212831242 is 242138212.

It can be written as a sum of positive squares in 2 ways, for example, as 211964481 + 866761 = 14559^2 + 931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (212831243) 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 3 ways as a sum of consecutive naturals, for example, 4092883 + ... + 4092934.

Almost surely, 2^212831242 is an apocalyptic number.

212831242 is a deficient number, since it is larger than the sum of its proper divisors (130973114).

212831242 is a wasteful number, since it uses less digits than its factorization.

212831242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8185832.

The product of its digits is 1536, while the sum is 25.

The square root of 212831242 is about 14588.7368198895. The cubic root of 212831242 is about 597.0514991202.

Adding to 212831242 its reverse (242138212), we get a palindrome (454969454).

The spelling of 212831242 in words is "two hundred twelve million, eight hundred thirty-one thousand, two hundred forty-two".