201421225 has 12 divisors (see below), whose sum is σ = 250765200. Its totient is φ = 160490000.

The previous prime is 201421217. The next prime is 201421237. The reversal of 201421225 is 522124102.

It is not a de Polignac number, because 201421225 - 2³ = 201421217 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 9775 + ... + 22324.

It is an arithmetic number, because the mean of its divisors is an integer number (20897100).

Almost surely, 2^201421225 is an apocalyptic number.

201421225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201421225 is a deficient number, since it is larger than the sum of its proper divisors (49343975).

201421225 is a wasteful number, since it uses less digits than its factorization.

201421225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32360 (or 32355 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 201421225 is about 14192.2945643050. The cubic root of 201421225 is about 586.1855083683.

Adding to 201421225 its reverse (522124102), we get a palindrome (723545327).

The spelling of 201421225 in words is "two hundred one million, four hundred twenty-one thousand, two hundred twenty-five".