1303131220 has 24 divisors (see below), whose sum is σ = 2751702408. Its totient is φ = 518371200.

The previous prime is 1303131199. The next prime is 1303131223. The reversal of 1303131220 is 221313031.

It can be written as a sum of positive squares in 4 ways, for example, as 47279376 + 1255851844 = 6876^2 + 35438^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1303131194 and 1303131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303131223) 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, 176371 + ... + 183610.

It is an arithmetic number, because the mean of its divisors is an integer number (114654267).

Almost surely, 2^1303131220 is an apocalyptic number.

1303131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1303131220 is an abundant number, since it is smaller than the sum of its proper divisors (1448571188).

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

1303131220 is a wasteful number, since it uses less digits than its factorization.

1303131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360171 (or 360169 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1303131220 is about 36098.9088477754. The cubic root of 1303131220 is about 1092.2684346366.

Adding to 1303131220 its reverse (221313031), we get a palindrome (1524444251).

The spelling of 1303131220 in words is "one billion, three hundred three million, one hundred thirty-one thousand, two hundred twenty".