1303431220 has 48 divisors (see below), whose sum is σ = 3368873088. Its totient is φ = 412513920.

The previous prime is 1303431211. The next prime is 1303431257. The reversal of 1303431220 is 221343031.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356266 + ... + 359905.

It is an arithmetic number, because the mean of its divisors is an integer number (70184856).

Almost surely, 2^1303431220 is an apocalyptic number.

1303431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1303431220 is an abundant number, since it is smaller than the sum of its proper divisors (2065441868).

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

1303431220 is a wasteful number, since it uses less digits than its factorization.

1303431220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716200 (or 716198 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1303431220 is about 36103.0638589026. The cubic root of 1303431220 is about 1092.3522469657.

Adding to 1303431220 its reverse (221343031), we get a palindrome (1524774251).

The spelling of 1303431220 in words is "one billion, three hundred three million, four hundred thirty-one thousand, two hundred twenty".