212521043 has 8 divisors (see below), whose sum is σ = 247464288. Its totient is φ = 178723584.

The previous prime is 212521037. The next prime is 212521051. The reversal of 212521043 is 340125212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212521043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212521073) 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 7 ways as a sum of consecutive naturals, for example, 286046 + ... + 286787.

It is an arithmetic number, because the mean of its divisors is an integer number (30933036).

Almost surely, 2^212521043 is an apocalyptic number.

212521043 is a deficient number, since it is larger than the sum of its proper divisors (34943245).

212521043 is an equidigital number, since it uses as much as digits as its factorization.

212521043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572893.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 212521043 is about 14578.1014881911. The cubic root of 212521043 is about 596.7612929345.

Adding to 212521043 its reverse (340125212), we get a palindrome (552646255).

The spelling of 212521043 in words is "two hundred twelve million, five hundred twenty-one thousand, forty-three".