1320304531 has 16 divisors (see below), whose sum is σ = 1635358144. Its totient is φ = 1037971584.

The previous prime is 1320304501. The next prime is 1320304553. The reversal of 1320304531 is 1354030231.

It is not a de Polignac number, because 1320304531 - 2¹⁹ = 1319780243 is a prime.

It is a super-2 number, since 2×1320304531² = 3486408109158259922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1320304501) 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, 31920 + ... + 60493.

It is an arithmetic number, because the mean of its divisors is an integer number (102209884).

Almost surely, 2^1320304531 is an apocalyptic number.

1320304531 is a deficient number, since it is larger than the sum of its proper divisors (315053613).

1320304531 is a wasteful number, since it uses less digits than its factorization.

1320304531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92590.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1320304531 is about 36335.9949774325. The cubic root of 1320304531 is about 1097.0456622639.

Adding to 1320304531 its reverse (1354030231), we get a palindrome (2674334762).

The spelling of 1320304531 in words is "one billion, three hundred twenty million, three hundred four thousand, five hundred thirty-one".