1133143220 has 36 divisors (see below), whose sum is σ = 2615599812. Its totient is φ = 412051200.

The previous prime is 1133143183. The next prime is 1133143229. The reversal of 1133143220 is 223413311.

1133143220 = 3000² + 3001² + ... + 3120².

It can be written as a sum of positive squares in 2 ways, for example, as 367182244 + 765960976 = 19162^2 + 27676^2 .

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 = 1133143192 and 1133143201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1133143229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231701 + ... + 236540.

Almost surely, 2^1133143220 is an apocalyptic number.

1133143220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1133143220 is an abundant number, since it is smaller than the sum of its proper divisors (1482456592).

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

1133143220 is a wasteful number, since it uses less digits than its factorization.

1133143220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468272 (or 468259 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1133143220 is about 33662.1927390359. The cubic root of 1133143220 is about 1042.5453003029.

Adding to 1133143220 its reverse (223413311), we get a palindrome (1356556531).

The spelling of 1133143220 in words is "one billion, one hundred thirty-three million, one hundred forty-three thousand, two hundred twenty".