1133133521 has 16 divisors (see below), whose sum is σ = 1309798224. Its totient is φ = 970942464.

The previous prime is 1133133509. The next prime is 1133133541. The reversal of 1133133521 is 1253313311.

It can be written as a sum of positive squares in 8 ways, for example, as 46771921 + 1086361600 = 6839^2 + 32960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1133133521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1133133541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18986 + ... + 51251.

It is an arithmetic number, because the mean of its divisors is an integer number (81862389).

Almost surely, 2^1133133521 is an apocalyptic number.

It is an amenable number.

1133133521 is a deficient number, since it is larger than the sum of its proper divisors (176664703).

1133133521 is a wasteful number, since it uses less digits than its factorization.

1133133521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70340.

The product of its digits is 810, while the sum is 23.

The square root of 1133133521 is about 33662.0486750287. The cubic root of 1133133521 is about 1042.5423257816.

Adding to 1133133521 its reverse (1253313311), we get a palindrome (2386446832).

The spelling of 1133133521 in words is "one billion, one hundred thirty-three million, one hundred thirty-three thousand, five hundred twenty-one".