212023291 has 4 divisors (see below), whose sum is σ = 218862784. Its totient is φ = 205183800.

The previous prime is 212023277. The next prime is 212023313. The reversal of 212023291 is 192320212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212023291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212023241) 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, 3419700 + ... + 3419761.

It is an arithmetic number, because the mean of its divisors is an integer number (54715696).

Almost surely, 2^212023291 is an apocalyptic number.

212023291 is a deficient number, since it is larger than the sum of its proper divisors (6839493).

212023291 is an equidigital number, since it uses as much as digits as its factorization.

212023291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6839492.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 212023291 is about 14561.0195728184. The cubic root of 212023291 is about 596.2950311367.

The spelling of 212023291 in words is "two hundred twelve million, twenty-three thousand, two hundred ninety-one".