211478417 has 8 divisors (see below), whose sum is σ = 223246560. Its totient is φ = 199774080.

The previous prime is 211478413. The next prime is 211478431. The reversal of 211478417 is 714874112.

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

It is a cyclic number.

It is not a de Polignac number, because 211478417 - 2² = 211478413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211478413) 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, 9059 + ... + 22472.

It is an arithmetic number, because the mean of its divisors is an integer number (27905820).

Almost surely, 2^211478417 is an apocalyptic number.

It is an amenable number.

211478417 is a deficient number, since it is larger than the sum of its proper divisors (11768143).

211478417 is a wasteful number, since it uses less digits than its factorization.

211478417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31903.

The product of its digits is 12544, while the sum is 35.

The square root of 211478417 is about 14542.2975144920. The cubic root of 211478417 is about 595.7837911090.

The spelling of 211478417 in words is "two hundred eleven million, four hundred seventy-eight thousand, four hundred seventeen".