1310323220 has 48 divisors (see below), whose sum is σ = 2901225600. Its totient is φ = 495734400.

The previous prime is 1310323213. The next prime is 1310323243. The reversal of 1310323220 is 223230131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263921 + ... + 268839.

It is an arithmetic number, because the mean of its divisors is an integer number (60442200).

Almost surely, 2^1310323220 is an apocalyptic number.

1310323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1310323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450612800).

1310323220 is an abundant number, since it is smaller than the sum of its proper divisors (1590902380).

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

1310323220 is a wasteful number, since it uses less digits than its factorization.

1310323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5648 (or 5646 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1310323220 is about 36198.3869806377. The cubic root of 1310323220 is about 1094.2741643479.

Adding to 1310323220 its reverse (223230131), we get a palindrome (1533553351).

The spelling of 1310323220 in words is "one billion, three hundred ten million, three hundred twenty-three thousand, two hundred twenty".