1043131320 has 384 divisors, whose sum is σ = 4275348480. Its totient is φ = 216057600.

The previous prime is 1043131279. The next prime is 1043131379. The reversal of 1043131320 is 231313401.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1043131293 and 1043131302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3353965 + ... + 3354275.

It is an arithmetic number, because the mean of its divisors is an integer number (11133720).

Almost surely, 2^1043131320 is an apocalyptic number.

1043131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1043131320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2137674240).

1043131320 is an abundant number, since it is smaller than the sum of its proper divisors (3232217160).

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

1043131320 is a wasteful number, since it uses less digits than its factorization.

1043131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1043131320 is about 32297.5435598437. The cubic root of 1043131320 is about 1014.1752203531.

Adding to 1043131320 its reverse (231313401), we get a palindrome (1274444721).

The spelling of 1043131320 in words is "one billion, forty-three million, one hundred thirty-one thousand, three hundred twenty".