203426221 has 4 divisors (see below), whose sum is σ = 205440444. Its totient is φ = 201412000.

The previous prime is 203426203. The next prime is 203426227. The reversal of 203426221 is 122624302.

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 129276900 + 74149321 = 11370^2 + 8611^2 .

It is a cyclic number.

It is not a de Polignac number, because 203426221 - 2⁵ = 203426189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203426192 and 203426201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203426227) 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, 1006960 + ... + 1007161.

It is an arithmetic number, because the mean of its divisors is an integer number (51360111).

Almost surely, 2^203426221 is an apocalyptic number.

It is an amenable number.

203426221 is a deficient number, since it is larger than the sum of its proper divisors (2014223).

203426221 is a wasteful number, since it uses less digits than its factorization.

203426221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014222.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 203426221 is about 14262.7564306483. The cubic root of 203426221 is about 588.1241012912.

The spelling of 203426221 in words is "two hundred three million, four hundred twenty-six thousand, two hundred twenty-one".