1304223531 has 12 divisors (see below), whose sum is σ = 1883021688. Its totient is φ = 802598784.

The previous prime is 1304223521. The next prime is 1304223559. The reversal of 1304223531 is 1353224031.

It is not a de Polignac number, because 1304223531 - 2²¹ = 1302126379 is a prime.

It is a super-2 number, since 2×1304223531² = 3401998037628215922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1304223521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1285710 + ... + 1286723.

It is an arithmetic number, because the mean of its divisors is an integer number (156918474).

Almost surely, 2^1304223531 is an apocalyptic number.

1304223531 is a deficient number, since it is larger than the sum of its proper divisors (578798157).

1304223531 is a wasteful number, since it uses less digits than its factorization.

1304223531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572462 (or 2572449 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1304223531 is about 36114.0350971752. The cubic root of 1304223531 is about 1092.5735365848.

Adding to 1304223531 its reverse (1353224031), we get a palindrome (2657447562).

The spelling of 1304223531 in words is "one billion, three hundred four million, two hundred twenty-three thousand, five hundred thirty-one".