240200021 has 8 divisors (see below), whose sum is σ = 260244864. Its totient is φ = 220812480.

The previous prime is 240199969. The next prime is 240200039. The reversal of 240200021 is 120002042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240200021 - 2¹⁰ = 240198997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 240199975 and 240200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240200621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163565 + ... + 165026.

It is an arithmetic number, because the mean of its divisors is an integer number (32530608).

Almost surely, 2^240200021 is an apocalyptic number.

It is an amenable number.

240200021 is a deficient number, since it is larger than the sum of its proper divisors (20044843).

240200021 is a wasteful number, since it uses less digits than its factorization.

240200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328651.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 240200021 is about 15498.3876903373. The cubic root of 240200021 is about 621.6190954054.

Adding to 240200021 its reverse (120002042), we get a palindrome (360202063).

The spelling of 240200021 in words is "two hundred forty million, two hundred thousand, twenty-one".