212033891 has 4 divisors (see below), whose sum is σ = 212715984. Its totient is φ = 211351800.

The previous prime is 212033881. The next prime is 212033917. The reversal of 212033891 is 198330212.

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 212033891 - 2⁶ = 212033827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212033851) 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, 340580 + ... + 341201.

It is an arithmetic number, because the mean of its divisors is an integer number (53178996).

Almost surely, 2^212033891 is an apocalyptic number.

212033891 is a deficient number, since it is larger than the sum of its proper divisors (682093).

212033891 is an equidigital number, since it uses as much as digits as its factorization.

212033891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682092.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 212033891 is about 14561.3835537699. The cubic root of 212033891 is about 596.3049681299.

The spelling of 212033891 in words is "two hundred twelve million, thirty-three thousand, eight hundred ninety-one".