1331233020 has 72 divisors (see below), whose sum is σ = 4348702176. Its totient is φ = 327687552.

The previous prime is 1331233019. The next prime is 1331233049. The reversal of 1331233020 is 203321331.

1331233020 is a `hidden beast` number, since 1 + 3 + 312 + 330 + 20 = 666.

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 = 1331232984 and 1331233002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282112 + ... + 286791.

Almost surely, 2^1331233020 is an apocalyptic number.

1331233020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331233020 is an abundant number, since it is smaller than the sum of its proper divisors (3017469156).

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

1331233020 is a wasteful number, since it uses less digits than its factorization.

1331233020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568931 (or 568926 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1331233020 is about 36486.0661074882. The cubic root of 1331233020 is about 1100.0641890917.

Adding to 1331233020 its reverse (203321331), we get a palindrome (1534554351).

The spelling of 1331233020 in words is "one billion, three hundred thirty-one million, two hundred thirty-three thousand, twenty".