214402421 has 4 divisors (see below), whose sum is σ = 214435500. Its totient is φ = 214369344.

The previous prime is 214402393. The next prime is 214402451. The reversal of 214402421 is 124204412.

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 7761796 + 206640625 = 2786^2 + 14375^2 .

It is a cyclic number.

It is not a de Polignac number, because 214402421 - 2²⁶ = 147293557 is a prime.

It is a super-2 number, since 2×214402421² = 91936796261322482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214402393 and 214402402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214402451) 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, 3266 + ... + 20963.

It is an arithmetic number, because the mean of its divisors is an integer number (53608875).

Almost surely, 2^214402421 is an apocalyptic number.

It is an amenable number.

214402421 is a deficient number, since it is larger than the sum of its proper divisors (33079).

214402421 is an equidigital number, since it uses as much as digits as its factorization.

214402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33078.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 214402421 is about 14642.4868447952. The cubic root of 214402421 is about 598.5170982083.

Adding to 214402421 its reverse (124204412), we get a palindrome (338606833).

The spelling of 214402421 in words is "two hundred fourteen million, four hundred two thousand, four hundred twenty-one".