303043421 has 4 divisors (see below), whose sum is σ = 303701244. Its totient is φ = 302385600.

The previous prime is 303043381. The next prime is 303043439. The reversal of 303043421 is 124340303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124340303 = 181 ⋅686963.

It can be written as a sum of positive squares in 2 ways, for example, as 72914521 + 230128900 = 8539^2 + 15170^2 .

It is a cyclic number.

It is not a de Polignac number, because 303043421 - 2¹⁴ = 303027037 is a prime.

It is a super-2 number, since 2×303043421² = 183670630022766482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 303043393 and 303043402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303043471) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 328220 + ... + 329141.

It is an arithmetic number, because the mean of its divisors is an integer number (75925311).

Almost surely, 2^303043421 is an apocalyptic number.

It is an amenable number.

303043421 is a deficient number, since it is larger than the sum of its proper divisors (657823).

303043421 is an equidigital number, since it uses as much as digits as its factorization.

303043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657822.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 303043421 is about 17408.1423764858. The cubic root of 303043421 is about 671.6890782510.

Adding to 303043421 its reverse (124340303), we get a palindrome (427383724).

The spelling of 303043421 in words is "three hundred three million, forty-three thousand, four hundred twenty-one".