1304231331 has 16 divisors (see below), whose sum is σ = 1873943456. Its totient is φ = 802089216.

The previous prime is 1304231317. The next prime is 1304231339. The reversal of 1304231331 is 1331324031.

It is not a de Polignac number, because 1304231331 - 2⁶ = 1304231267 is a prime.

It is a super-2 number, since 2×1304231331² = 3402038729524063122, 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 = 1304231298 and 1304231307.

It is not an unprimeable number, because it can be changed into a prime (1304231339) 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, 56151 + ... + 75903.

It is an arithmetic number, because the mean of its divisors is an integer number (117121466).

Almost surely, 2^1304231331 is an apocalyptic number.

1304231331 is a deficient number, since it is larger than the sum of its proper divisors (569712125).

1304231331 is a wasteful number, since it uses less digits than its factorization.

1304231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21462.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1304231331 is about 36114.1430882694. The cubic root of 1304231331 is about 1092.5757146512.

Adding to 1304231331 its reverse (1331324031), we get a palindrome (2635555362).

The spelling of 1304231331 in words is "one billion, three hundred four million, two hundred thirty-one thousand, three hundred thirty-one".