201020051 has 8 divisors (see below), whose sum is σ = 202984704. Its totient is φ = 199065280.

The previous prime is 201020047. The next prime is 201020101. The reversal of 201020051 is 150020102.

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 201020051 - 2² = 201020047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201020011) 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 7 ways as a sum of consecutive naturals, for example, 42245 + ... + 46761.

It is an arithmetic number, because the mean of its divisors is an integer number (25373088).

Almost surely, 2^201020051 is an apocalyptic number.

201020051 is a deficient number, since it is larger than the sum of its proper divisors (1964653).

201020051 is a wasteful number, since it uses less digits than its factorization.

201020051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4941.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 201020051 is about 14178.1540053704. The cubic root of 201020051 is about 585.7960779037.

Adding to 201020051 its reverse (150020102), we get a palindrome (351040153).

The spelling of 201020051 in words is "two hundred one million, twenty thousand, fifty-one".