212132441 has 4 divisors (see below), whose sum is σ = 215610084. Its totient is φ = 208654800.

The previous prime is 212132429. The next prime is 212132449. The reversal of 212132441 is 144231212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24552025 + 187580416 = 4955^2 + 13696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212132441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212132449) 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, 1738730 + ... + 1738851.

It is an arithmetic number, because the mean of its divisors is an integer number (53902521).

Almost surely, 2^212132441 is an apocalyptic number.

It is an amenable number.

212132441 is a deficient number, since it is larger than the sum of its proper divisors (3477643).

212132441 is an equidigital number, since it uses as much as digits as its factorization.

212132441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477642.

The product of its digits is 384, while the sum is 20.

The square root of 212132441 is about 14564.7671110801. The cubic root of 212132441 is about 596.3973381943.

Adding to 212132441 its reverse (144231212), we get a palindrome (356363653).

The spelling of 212132441 in words is "two hundred twelve million, one hundred thirty-two thousand, four hundred forty-one".