201220424 has 16 divisors (see below), whose sum is σ = 377599920. Its totient is φ = 100527120.

The previous prime is 201220423. The next prime is 201220429. The reversal of 201220424 is 424022102.

It is a happy number.

201220424 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (201220423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 20069.

It is an arithmetic number, because the mean of its divisors is an integer number (23599995).

Almost surely, 2^201220424 is an apocalyptic number.

It is an amenable number.

201220424 is a deficient number, since it is larger than the sum of its proper divisors (176379496).

201220424 is a wasteful number, since it uses less digits than its factorization.

201220424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20780 (or 20776 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 201220424 is about 14185.2185037806. The cubic root of 201220424 is about 585.9906501011.

Adding to 201220424 its reverse (424022102), we get a palindrome (625242526).

The spelling of 201220424 in words is "two hundred one million, two hundred twenty thousand, four hundred twenty-four".