1313043320 has 32 divisors (see below), whose sum is σ = 3082799520. Its totient is φ = 502381440.

The previous prime is 1313043299. The next prime is 1313043337. The reversal of 1313043320 is 233403131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1313043292 and 1313043301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712691 + ... + 714530.

It is an arithmetic number, because the mean of its divisors is an integer number (96337485).

Almost surely, 2^1313043320 is an apocalyptic number.

1313043320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313043320 is an abundant number, since it is smaller than the sum of its proper divisors (1769756200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1313043320 is a wasteful number, since it uses less digits than its factorization.

1313043320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427255 (or 1427251 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1313043320 is about 36235.9396180091. The cubic root of 1313043320 is about 1095.0308422469.

Adding to 1313043320 its reverse (233403131), we get a palindrome (1546446451).

The spelling of 1313043320 in words is "one billion, three hundred thirteen million, forty-three thousand, three hundred twenty".