214004405 has 4 divisors (see below), whose sum is σ = 256805292. Its totient is φ = 171203520.

The previous prime is 214004389. The next prime is 214004419. The reversal of 214004405 is 504400412.

214004405 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 133310116 + 80694289 = 11546^2 + 8983^2 .

It is not a de Polignac number, because 214004405 - 2⁴ = 214004389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21400436 + ... + 21400445.

It is an arithmetic number, because the mean of its divisors is an integer number (64201323).

Almost surely, 2^214004405 is an apocalyptic number.

It is an amenable number.

214004405 is a deficient number, since it is larger than the sum of its proper divisors (42800887).

214004405 is an equidigital number, since it uses as much as digits as its factorization.

214004405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42800886.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 214004405 is about 14628.8893973534. The cubic root of 214004405 is about 598.1465070207.

Adding to 214004405 its reverse (504400412), we get a palindrome (718404817).

The spelling of 214004405 in words is "two hundred fourteen million, four thousand, four hundred five".