1131703220 has 24 divisors (see below), whose sum is σ = 2383067904. Its totient is φ = 451444896.

The previous prime is 1131703217. The next prime is 1131703229. The reversal of 1131703220 is 223071311.

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 = 1131703192 and 1131703201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131703229) 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, 69752 + ... + 84431.

It is an arithmetic number, because the mean of its divisors is an integer number (99294496).

Almost surely, 2^1131703220 is an apocalyptic number.

1131703220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131703220 is an abundant number, since it is smaller than the sum of its proper divisors (1251364684).

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

1131703220 is a wasteful number, since it uses less digits than its factorization.

1131703220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154559 (or 154557 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1131703220 is about 33640.7969584551. The cubic root of 1131703220 is about 1042.1034904204.

Adding to 1131703220 its reverse (223071311), we get a palindrome (1354774531).

The spelling of 1131703220 in words is "one billion, one hundred thirty-one million, seven hundred three thousand, two hundred twenty".