304231431 has 16 divisors (see below), whose sum is σ = 479577600. Its totient is φ = 167851488.

The previous prime is 304231393. The next prime is 304231441. The reversal of 304231431 is 134132403.

It is not a de Polignac number, because 304231431 - 2¹¹ = 304229383 is a prime.

It is a super-2 number, since 2×304231431² = 185113527216615522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 304231398 and 304231407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304231441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249171 + ... + 250388.

It is an arithmetic number, because the mean of its divisors is an integer number (29973600).

Almost surely, 2^304231431 is an apocalyptic number.

304231431 is a deficient number, since it is larger than the sum of its proper divisors (175346169).

304231431 is a wasteful number, since it uses less digits than its factorization.

304231431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499598.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 304231431 is about 17442.2312506170. The cubic root of 304231431 is about 672.5656664410.

Adding to 304231431 its reverse (134132403), we get a palindrome (438363834).

The spelling of 304231431 in words is "three hundred four million, two hundred thirty-one thousand, four hundred thirty-one".