1313435320 has 32 divisors (see below), whose sum is σ = 2962000800. Its totient is φ = 524170368.

The previous prime is 1313435231. The next prime is 1313435323. The reversal of 1313435320 is 235343131.

It is a super-2 number, since 2×1313435320² = 3450224679647004800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313435323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19839 + ... + 54958.

It is an arithmetic number, because the mean of its divisors is an integer number (92562525).

Almost surely, 2^1313435320 is an apocalyptic number.

1313435320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313435320 is an abundant number, since it is smaller than the sum of its proper divisors (1648565480).

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

1313435320 is a wasteful number, since it uses less digits than its factorization.

1313435320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75247 (or 75243 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 1313435320 is about 36241.3482089174. The cubic root of 1313435320 is about 1095.1398026988.

Adding to 1313435320 its reverse (235343131), we get a palindrome (1548778451).

The spelling of 1313435320 in words is "one billion, three hundred thirteen million, four hundred thirty-five thousand, three hundred twenty".