214678561 has 4 divisors (see below), whose sum is σ = 222081300. Its totient is φ = 207275824.

The previous prime is 214678559. The next prime is 214678577. The reversal of 214678561 is 165876412.

214678561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138203536 + 76475025 = 11756^2 + 8745^2 .

It is a cyclic number.

It is not a de Polignac number, because 214678561 - 2¹ = 214678559 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (214678531) 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, 3701326 + ... + 3701383.

It is an arithmetic number, because the mean of its divisors is an integer number (55520325).

Almost surely, 2^214678561 is an apocalyptic number.

It is an amenable number.

214678561 is a deficient number, since it is larger than the sum of its proper divisors (7402739).

214678561 is an equidigital number, since it uses as much as digits as its factorization.

214678561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7402738.

The product of its digits is 80640, while the sum is 40.

The square root of 214678561 is about 14651.9132197812. The cubic root of 214678561 is about 598.7739417120.

The spelling of 214678561 in words is "two hundred fourteen million, six hundred seventy-eight thousand, five hundred sixty-one".