203228639 has 4 divisors (see below), whose sum is σ = 203354424. Its totient is φ = 203102856.

The previous prime is 203228629. The next prime is 203228651. The reversal of 203228639 is 936822302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 203228639 - 2¹² = 203224543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203228599 and 203228608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203228629) 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, 60437 + ... + 63710.

It is an arithmetic number, because the mean of its divisors is an integer number (50838606).

Almost surely, 2^203228639 is an apocalyptic number.

203228639 is a deficient number, since it is larger than the sum of its proper divisors (125785).

203228639 is a wasteful number, since it uses less digits than its factorization.

203228639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125784.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 203228639 is about 14255.8282467207. The cubic root of 203228639 is about 587.9336303064.

The spelling of 203228639 in words is "two hundred three million, two hundred twenty-eight thousand, six hundred thirty-nine".