240021133 has 4 divisors (see below), whose sum is σ = 261841248. Its totient is φ = 218201020.

The previous prime is 240021107. The next prime is 240021149. The reversal of 240021133 is 331120042.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240021133 - 2⁵ = 240021101 is a prime.

It is a super-2 number, since 2×240021133² = 115220288573207378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240021533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10910041 + ... + 10910062.

It is an arithmetic number, because the mean of its divisors is an integer number (65460312).

Almost surely, 2^240021133 is an apocalyptic number.

It is an amenable number.

240021133 is a deficient number, since it is larger than the sum of its proper divisors (21820115).

240021133 is a wasteful number, since it uses less digits than its factorization.

240021133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21820114.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 240021133 is about 15492.6154344578. The cubic root of 240021133 is about 621.4647409733.

Adding to 240021133 its reverse (331120042), we get a palindrome (571141175).

The spelling of 240021133 in words is "two hundred forty million, twenty-one thousand, one hundred thirty-three".