203138650 has 48 divisors (see below), whose sum is σ = 443909088. Its totient is φ = 68184000.

The previous prime is 203138647. The next prime is 203138651. The reversal of 203138650 is 56831302.

203138650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×203138650² = 82530622247645000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (203138651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7056 + ... + 21355.

It is an arithmetic number, because the mean of its divisors is an integer number (9248106).

Almost surely, 2^203138650 is an apocalyptic number.

203138650 is an abundant number, since it is smaller than the sum of its proper divisors (240770438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203138650 is a wasteful number, since it uses less digits than its factorization.

203138650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28447 (or 28442 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 203138650 is about 14252.6716793730. The cubic root of 203138650 is about 587.8468391095.

Adding to 203138650 its reverse (56831302), we get a palindrome (259969952).

The spelling of 203138650 in words is "two hundred three million, one hundred thirty-eight thousand, six hundred fifty".