1333231220 has 24 divisors (see below), whose sum is σ = 2806453608. Its totient is φ = 532022400.

The previous prime is 1333231219. The next prime is 1333231231. The reversal of 1333231220 is 221323331.

It can be written as a sum of positive squares in 4 ways, for example, as 32330596 + 1300900624 = 5686^2 + 36068^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1333231192 and 1333231201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70751 + ... + 87590.

It is an arithmetic number, because the mean of its divisors is an integer number (116935567).

Almost surely, 2^1333231220 is an apocalyptic number.

1333231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1333231220 is an abundant number, since it is smaller than the sum of its proper divisors (1473222388).

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

1333231220 is a wasteful number, since it uses less digits than its factorization.

1333231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158771 (or 158769 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1333231220 is about 36513.4388958367. The cubic root of 1333231220 is about 1100.6143180144.

Adding to 1333231220 its reverse (221323331), we get a palindrome (1554554551).

The spelling of 1333231220 in words is "one billion, three hundred thirty-three million, two hundred thirty-one thousand, two hundred twenty".