304220431 has 4 divisors (see below), whose sum is σ = 304576272. Its totient is φ = 303864592.

The previous prime is 304220387. The next prime is 304220437. The reversal of 304220431 is 134022403.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 304220431 - 2²¹ = 302123279 is a prime.

It is a super-2 number, since 2×304220431² = 185100141275651522, 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 = 304220399 and 304220408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304220437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176635 + ... + 178348.

It is an arithmetic number, because the mean of its divisors is an integer number (76144068).

Almost surely, 2^304220431 is an apocalyptic number.

304220431 is a deficient number, since it is larger than the sum of its proper divisors (355841).

304220431 is an equidigital number, since it uses as much as digits as its factorization.

304220431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355840.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 304220431 is about 17441.9159211366. The cubic root of 304220431 is about 672.5575604284.

Adding to 304220431 its reverse (134022403), we get a palindrome (438242834).

The spelling of 304220431 in words is "three hundred four million, two hundred twenty thousand, four hundred thirty-one".