212131043 has 4 divisors (see below), whose sum is σ = 213357408. Its totient is φ = 210904680.

The previous prime is 212131039. The next prime is 212131057. The reversal of 212131043 is 340131212.

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 212131043 - 2² = 212131039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212131013) 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, 612923 + ... + 613268.

It is an arithmetic number, because the mean of its divisors is an integer number (53339352).

Almost surely, 2^212131043 is an apocalyptic number.

212131043 is a deficient number, since it is larger than the sum of its proper divisors (1226365).

212131043 is a wasteful number, since it uses less digits than its factorization.

212131043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226364.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 212131043 is about 14564.7191184726. The cubic root of 212131043 is about 596.3960280610.

Adding to 212131043 its reverse (340131212), we get a palindrome (552262255).

The spelling of 212131043 in words is "two hundred twelve million, one hundred thirty-one thousand, forty-three".