1313204220 has 36 divisors (see below), whose sum is σ = 3983386680. Its totient is φ = 350187744.

The previous prime is 1313204213. The next prime is 1313204261. The reversal of 1313204220 is 224023131.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1313204193 and 1313204202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3647610 + ... + 3647969.

It is an arithmetic number, because the mean of its divisors is an integer number (110649630).

Almost surely, 2^1313204220 is an apocalyptic number.

1313204220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313204220 is an abundant number, since it is smaller than the sum of its proper divisors (2670182460).

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

1313204220 is a wasteful number, since it uses less digits than its factorization.

1313204220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7295594 (or 7295589 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1313204220 is about 36238.1597214870. The cubic root of 1313204220 is about 1095.0755686885.

Adding to 1313204220 its reverse (224023131), we get a palindrome (1537227351).

The spelling of 1313204220 in words is "one billion, three hundred thirteen million, two hundred four thousand, two hundred twenty".