201421044 has 144 divisors (see below), whose sum is σ = 582603840. Its totient is φ = 58129920.

The previous prime is 201421019. The next prime is 201421057. The reversal of 201421044 is 440124102.

201421044 is a `hidden beast` number, since 201 + 421 + 0 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 864352 + ... + 864584.

It is an arithmetic number, because the mean of its divisors is an integer number (4045860).

Almost surely, 2^201421044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201421044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291301920).

201421044 is an abundant number, since it is smaller than the sum of its proper divisors (381182796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201421044 is a wasteful number, since it uses less digits than its factorization.

201421044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 201421044 is about 14192.2881876039. The cubic root of 201421044 is about 586.1853327834.

Adding to 201421044 its reverse (440124102), we get a palindrome (641545146).

The spelling of 201421044 in words is "two hundred one million, four hundred twenty-one thousand, forty-four".