203421427 has 8 divisors (see below), whose sum is σ = 222225840. Its totient is φ = 184668960.

The previous prime is 203421401. The next prime is 203421431. The reversal of 203421427 is 724124302.

It is a happy number.

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 203421427 - 2²⁷ = 69203699 is a prime.

It is a super-4 number, since 4×203421427⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203421437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4552 + ... + 20677.

It is an arithmetic number, because the mean of its divisors is an integer number (27778230).

Almost surely, 2^203421427 is an apocalyptic number.

203421427 is a deficient number, since it is larger than the sum of its proper divisors (18804413).

203421427 is a wasteful number, since it uses less digits than its factorization.

203421427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25973.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 203421427 is about 14262.5883695772. The cubic root of 203421427 is about 588.1194812885.

Adding to 203421427 its reverse (724124302), we get a palindrome (927545729).

The spelling of 203421427 in words is "two hundred three million, four hundred twenty-one thousand, four hundred twenty-seven".