203221412 has 6 divisors (see below), whose sum is σ = 355637478. Its totient is φ = 101610704.

The previous prime is 203221411. The next prime is 203221471. The reversal of 203221412 is 214122302.

It can be written as a sum of positive squares in only one way, i.e., 202606756 + 614656 = 14234^2 + 784^2 .

It is not an unprimeable number, because it can be changed into a prime (203221411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25402673 + ... + 25402680.

It is an arithmetic number, because the mean of its divisors is an integer number (59272913).

Almost surely, 2^203221412 is an apocalyptic number.

It is an amenable number.

203221412 is a deficient number, since it is larger than the sum of its proper divisors (152416066).

203221412 is a wasteful number, since it uses less digits than its factorization.

203221412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50805357 (or 50805355 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 203221412 is about 14255.5747691912. The cubic root of 203221412 is about 587.9266610677.

Adding to 203221412 its reverse (214122302), we get a palindrome (417343714).

The spelling of 203221412 in words is "two hundred three million, two hundred twenty-one thousand, four hundred twelve".