1300031220 has 24 divisors (see below), whose sum is σ = 3640087584. Its totient is φ = 346674976.

The previous prime is 1300031219. The next prime is 1300031237. The reversal of 1300031220 is 221300031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1300031196 and 1300031205.

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 7 ways as a sum of consecutive naturals, for example, 10833534 + ... + 10833653.

It is an arithmetic number, because the mean of its divisors is an integer number (151670316).

Almost surely, 2^1300031220 is an apocalyptic number.

1300031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1300031220 is an abundant number, since it is smaller than the sum of its proper divisors (2340056364).

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

1300031220 is a wasteful number, since it uses less digits than its factorization.

1300031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21667199 (or 21667197 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1300031220 is about 36055.9456955438. The cubic root of 1300031220 is about 1091.4016197311.

Adding to 1300031220 its reverse (221300031), we get a palindrome (1521331251).

The spelling of 1300031220 in words is "one billion, three hundred million, thirty-one thousand, two hundred twenty".