1133501220 has 36 divisors (see below), whose sum is σ = 3438287580. Its totient is φ = 302266944.

The previous prime is 1133501219. The next prime is 1133501227. The reversal of 1133501220 is 221053311.

It can be written as a sum of positive squares in 2 ways, for example, as 371409984 + 762091236 = 19272^2 + 27606^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 1133501193 and 1133501202.

It is not an unprimeable number, because it can be changed into a prime (1133501227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3148435 + ... + 3148794.

Almost surely, 2^1133501220 is an apocalyptic number.

1133501220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1133501220 is an abundant number, since it is smaller than the sum of its proper divisors (2304786360).

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

1133501220 is a wasteful number, since it uses less digits than its factorization.

1133501220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6297244 (or 6297239 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1133501220 is about 33667.5098574278. The cubic root of 1133501220 is about 1042.6550810473.

Adding to 1133501220 its reverse (221053311), we get a palindrome (1354554531).

The spelling of 1133501220 in words is "one billion, one hundred thirty-three million, five hundred one thousand, two hundred twenty".