212240917 has 8 divisors (see below), whose sum is σ = 249117056. Its totient is φ = 177003792.

The previous prime is 212240893. The next prime is 212240927. The reversal of 212240917 is 719042212.

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

It is not a de Polignac number, because 212240917 - 2⁷ = 212240789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212240927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409473 + ... + 409990.

It is an arithmetic number, because the mean of its divisors is an integer number (31139632).

Almost surely, 2^212240917 is an apocalyptic number.

It is an amenable number.

212240917 is a deficient number, since it is larger than the sum of its proper divisors (36876139).

212240917 is an equidigital number, since it uses as much as digits as its factorization.

212240917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819507.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 212240917 is about 14568.4905532454. The cubic root of 212240917 is about 596.4989787434.

The spelling of 212240917 in words is "two hundred twelve million, two hundred forty thousand, nine hundred seventeen".