203302421 has 6 divisors (see below), whose sum is σ = 236494710. Its totient is φ = 174259176.

The previous prime is 203302403. The next prime is 203302427. The reversal of 203302421 is 124203302.

It can be written as a sum of positive squares in only one way, i.e., 198951025 + 4351396 = 14105^2 + 2086^2 .

It is not a de Polignac number, because 203302421 - 2⁶ = 203302357 is a prime.

It is a super-2 number, since 2×203302421² = 82663748768922482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203302421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203302427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2074466 + ... + 2074563.

It is an arithmetic number, because the mean of its divisors is an integer number (39415785).

Almost surely, 2^203302421 is an apocalyptic number.

It is an amenable number.

203302421 is a deficient number, since it is larger than the sum of its proper divisors (33192289).

203302421 is an equidigital number, since it uses as much as digits as its factorization.

203302421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4149043 (or 4149036 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 203302421 is about 14258.4157955924. The cubic root of 203302421 is about 588.0047713143.

Adding to 203302421 its reverse (124203302), we get a palindrome (327505723).

The spelling of 203302421 in words is "two hundred three million, three hundred two thousand, four hundred twenty-one".