212117926 has 8 divisors (see below), whose sum is σ = 319044960. Its totient is φ = 105769608.

The previous prime is 212117869. The next prime is 212117947. The reversal of 212117926 is 629711212.

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

It is a congruent number.

It is an unprimeable number.

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, 143761 + ... + 145228.

It is an arithmetic number, because the mean of its divisors is an integer number (39880620).

Almost surely, 2^212117926 is an apocalyptic number.

212117926 is a deficient number, since it is larger than the sum of its proper divisors (106927034).

212117926 is a wasteful number, since it uses less digits than its factorization.

212117926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289358.

The product of its digits is 3024, while the sum is 31.

The square root of 212117926 is about 14564.2688110320. The cubic root of 212117926 is about 596.3837352068.

The spelling of 212117926 in words is "two hundred twelve million, one hundred seventeen thousand, nine hundred twenty-six".