1303231120 has 20 divisors (see below), whose sum is σ = 3030012540. Its totient is φ = 521292416.

The previous prime is 1303231091. The next prime is 1303231121. The reversal of 1303231120 is 211323031.

It can be written as a sum of positive squares in 2 ways, for example, as 725117184 + 578113936 = 26928^2 + 24044^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1303231120² = 3396822704272908800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1303231094 and 1303231103.

It is not an unprimeable number, because it can be changed into a prime (1303231121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8145115 + ... + 8145274.

It is an arithmetic number, because the mean of its divisors is an integer number (151500627).

Almost surely, 2^1303231120 is an apocalyptic number.

1303231120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1303231120 is an abundant number, since it is smaller than the sum of its proper divisors (1726781420).

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

1303231120 is a wasteful number, since it uses less digits than its factorization.

1303231120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16290402 (or 16290396 counting only the distinct ones).

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

The square root of 1303231120 is about 36100.2925195905. The cubic root of 1303231120 is about 1092.2963455706.

Adding to 1303231120 its reverse (211323031), we get a palindrome (1514554151).

The spelling of 1303231120 in words is "one billion, three hundred three million, two hundred thirty-one thousand, one hundred twenty".