2011533481 has 4 divisors (see below), whose sum is σ = 2020317700. Its totient is φ = 2002749264.

The previous prime is 2011533479. The next prime is 2011533521. The reversal of 2011533481 is 1843351102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1936000000 + 75533481 = 44000^2 + 8691^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011533481 - 2¹ = 2011533479 is a prime.

It is a super-2 number, since 2×2011533481² = 8092533890367954722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011533451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4391766 + ... + 4392223.

It is an arithmetic number, because the mean of its divisors is an integer number (505079425).

Almost surely, 2^2011533481 is an apocalyptic number.

It is an amenable number.

2011533481 is a deficient number, since it is larger than the sum of its proper divisors (8784219).

2011533481 is an equidigital number, since it uses as much as digits as its factorization.

2011533481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8784218.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2011533481 is about 44850.1224190080. The cubic root of 2011533481 is about 1262.3382885513.

Adding to 2011533481 its reverse (1843351102), we get a palindrome (3854884583).

The spelling of 2011533481 in words is "two billion, eleven million, five hundred thirty-three thousand, four hundred eighty-one".