201421143 has 48 divisors (see below), whose sum is σ = 378533376. Its totient is φ = 100077120.

The previous prime is 201421141. The next prime is 201421183. The reversal of 201421143 is 341124102.

201421143 is a `hidden beast` number, since 201 + 421 + 1 + 43 = 666.

It is not a de Polignac number, because 201421143 - 2¹ = 201421141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201421141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9621 + ... + 22257.

It is an arithmetic number, because the mean of its divisors is an integer number (7886112).

Almost surely, 2^201421143 is an apocalyptic number.

201421143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

201421143 is a deficient number, since it is larger than the sum of its proper divisors (177112233).

201421143 is a wasteful number, since it uses less digits than its factorization.

201421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12684 (or 12681 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 201421143 is about 14192.2916754131. The cubic root of 201421143 is about 586.1854288216.

Adding to 201421143 its reverse (341124102), we get a palindrome (542545245).

The spelling of 201421143 in words is "two hundred one million, four hundred twenty-one thousand, one hundred forty-three".