203203145 has 8 divisors (see below), whose sum is σ = 252252360. Its totient is φ = 156956800.

The previous prime is 203203123. The next prime is 203203151. The reversal of 203203145 is 541302302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23348224 + 179854921 = 4832^2 + 13411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203203145 - 2⁸ = 203202889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700556 + ... + 700845.

It is an arithmetic number, because the mean of its divisors is an integer number (31531545).

Almost surely, 2^203203145 is an apocalyptic number.

It is an amenable number.

203203145 is a deficient number, since it is larger than the sum of its proper divisors (49049215).

203203145 is a wasteful number, since it uses less digits than its factorization.

203203145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401435.

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

The square root of 203203145 is about 14254.9340580727. The cubic root of 203203145 is about 587.9090448496.

Adding to 203203145 its reverse (541302302), we get a palindrome (744505447).

The spelling of 203203145 in words is "two hundred three million, two hundred three thousand, one hundred forty-five".