201424821 has 8 divisors (see below), whose sum is σ = 289225440. Its totient is φ = 123953712.

The previous prime is 201424793. The next prime is 201424829. The reversal of 201424821 is 128424102.

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

It is not a de Polignac number, because 201424821 - 2⁷ = 201424693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201424791 and 201424800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201424829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2582331 + ... + 2582408.

It is an arithmetic number, because the mean of its divisors is an integer number (36153180).

Almost surely, 2^201424821 is an apocalyptic number.

It is an amenable number.

201424821 is a deficient number, since it is larger than the sum of its proper divisors (87800619).

201424821 is a wasteful number, since it uses less digits than its factorization.

201424821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164755.

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 201424821 is about 14192.4212522036. The cubic root of 201424821 is about 586.1889967636.

Adding to 201424821 its reverse (128424102), we get a palindrome (329848923).

The spelling of 201424821 in words is "two hundred one million, four hundred twenty-four thousand, eight hundred twenty-one".