200021045 has 16 divisors (see below), whose sum is σ = 274551168. Its totient is φ = 137039040.

The previous prime is 200021023. The next prime is 200021057. The reversal of 200021045 is 540120002.

200021045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 200021045 - 2¹⁴ = 200004661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63815 + ... + 66875.

It is an arithmetic number, because the mean of its divisors is an integer number (17159448).

Almost surely, 2^200021045 is an apocalyptic number.

It is an amenable number.

200021045 is a deficient number, since it is larger than the sum of its proper divisors (74530123).

200021045 is a wasteful number, since it uses less digits than its factorization.

200021045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 200021045 is about 14142.8796572692. The cubic root of 200021045 is about 584.8240589076.

Adding to 200021045 its reverse (540120002), we get a palindrome (740141047).

The spelling of 200021045 in words is "two hundred million, twenty-one thousand, forty-five".