203920245 has 12 divisors (see below), whose sum is σ = 353461836. Its totient is φ = 108757440.

The previous prime is 203920243. The next prime is 203920259. The reversal of 203920245 is 542029302.

It can be written as a sum of positive squares in 2 ways, for example, as 31102929 + 172817316 = 5577^2 + 13146^2 .

It is not a de Polignac number, because 203920245 - 2¹ = 203920243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203920243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2265736 + ... + 2265825.

It is an arithmetic number, because the mean of its divisors is an integer number (29455153).

Almost surely, 2^203920245 is an apocalyptic number.

It is an amenable number.

203920245 is a deficient number, since it is larger than the sum of its proper divisors (149541591).

203920245 is a wasteful number, since it uses less digits than its factorization.

203920245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531572 (or 4531569 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 203920245 is about 14280.0646006942. The cubic root of 203920245 is about 588.5998061711.

Adding to 203920245 its reverse (542029302), we get a palindrome (745949547).

The spelling of 203920245 in words is "two hundred three million, nine hundred twenty thousand, two hundred forty-five".