1003131320 has 32 divisors (see below), whose sum is σ = 2280322800. Its totient is φ = 397114368.

The previous prime is 1003131319. The next prime is 1003131329. The reversal of 1003131320 is 231313001.

It is a junction number, because it is equal to n+sod(n) for n = 1003131295 and 1003131304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003131329) 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, 125390 + ... + 133149.

Almost surely, 2^1003131320 is an apocalyptic number.

1003131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1003131320 is an abundant number, since it is smaller than the sum of its proper divisors (1277191480).

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

1003131320 is a wasteful number, since it uses less digits than its factorization.

1003131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258647 (or 258643 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1003131320 is about 31672.2484203443. The cubic root of 1003131320 is about 1001.0426857619.

Adding to 1003131320 its reverse (231313001), we get a palindrome (1234444321).

The spelling of 1003131320 in words is "one billion, three million, one hundred thirty-one thousand, three hundred twenty".