203421053 has 8 divisors (see below), whose sum is σ = 222169440. Its totient is φ = 184715280.

The previous prime is 203421019. The next prime is 203421059. The reversal of 203421053 is 350124302.

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 203421053 - 2¹⁸ = 203158909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203421059) 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, 218 + ... + 20171.

It is an arithmetic number, because the mean of its divisors is an integer number (27771180).

Almost surely, 2^203421053 is an apocalyptic number.

It is an amenable number.

203421053 is a deficient number, since it is larger than the sum of its proper divisors (18748387).

203421053 is a wasteful number, since it uses less digits than its factorization.

203421053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21307.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 203421053 is about 14262.5752583466. The cubic root of 203421053 is about 588.1191208597.

Adding to 203421053 its reverse (350124302), we get a palindrome (553545355).

The spelling of 203421053 in words is "two hundred three million, four hundred twenty-one thousand, fifty-three".