212042031 has 4 divisors (see below), whose sum is σ = 282722712. Its totient is φ = 141361352.

The previous prime is 212042027. The next prime is 212042041. The reversal of 212042031 is 130240212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212042031 - 2² = 212042027 is a prime.

It is a super-2 number, since 2×212042031² = 89923645821209922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212042031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212042011) 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, 35340336 + ... + 35340341.

It is an arithmetic number, because the mean of its divisors is an integer number (70680678).

Almost surely, 2^212042031 is an apocalyptic number.

212042031 is a deficient number, since it is larger than the sum of its proper divisors (70680681).

212042031 is an equidigital number, since it uses as much as digits as its factorization.

212042031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70680680.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212042031 is about 14561.6630574945. The cubic root of 212042031 is about 596.3125987659.

Adding to 212042031 its reverse (130240212), we get a palindrome (342282243).

The spelling of 212042031 in words is "two hundred twelve million, forty-two thousand, thirty-one".