217214401 has 4 divisors (see below), whose sum is σ = 221836032. Its totient is φ = 212592772.

The previous prime is 217214399. The next prime is 217214407. The reversal of 217214401 is 104412712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 217214401 - 2¹ = 217214399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217214407) 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, 2310745 + ... + 2310838.

It is an arithmetic number, because the mean of its divisors is an integer number (55459008).

Almost surely, 2^217214401 is an apocalyptic number.

It is an amenable number.

217214401 is a deficient number, since it is larger than the sum of its proper divisors (4621631).

217214401 is an equidigital number, since it uses as much as digits as its factorization.

217214401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4621630.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 217214401 is about 14738.1953101457. The cubic root of 217214401 is about 601.1223446322.

The spelling of 217214401 in words is "two hundred seventeen million, two hundred fourteen thousand, four hundred one".