1313311220 has 48 divisors (see below), whose sum is σ = 3014473728. Its totient is φ = 477671040.

The previous prime is 1313311159. The next prime is 1313311229. The reversal of 1313311220 is 221133131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313311229) 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, 20276 + ... + 55115.

It is an arithmetic number, because the mean of its divisors is an integer number (62801536).

Almost surely, 2^1313311220 is an apocalyptic number.

1313311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313311220 is an abundant number, since it is smaller than the sum of its proper divisors (1701162508).

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

1313311220 is a wasteful number, since it uses less digits than its factorization.

1313311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75480 (or 75478 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1313311220 is about 36239.6360356999. The cubic root of 1313311220 is about 1095.1053101666.

Adding to 1313311220 its reverse (221133131), we get a palindrome (1534444351).

The spelling of 1313311220 in words is "one billion, three hundred thirteen million, three hundred eleven thousand, two hundred twenty".