201227820 has 48 divisors (see below), whose sum is σ = 581618688. Its totient is φ = 51929280.

The previous prime is 201227813. The next prime is 201227849. The reversal of 201227820 is 28722102.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52234 + ... + 55953.

It is an arithmetic number, because the mean of its divisors is an integer number (12117056).

Almost surely, 2^201227820 is an apocalyptic number.

201227820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201227820 is an abundant number, since it is smaller than the sum of its proper divisors (380390868).

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

201227820 is a wasteful number, since it uses less digits than its factorization.

201227820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108230 (or 108228 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 201227820 is about 14185.4791952898. The cubic root of 201227820 is about 585.9978295143.

Adding to 201227820 its reverse (28722102), we get a palindrome (229949922).

The spelling of 201227820 in words is "two hundred one million, two hundred twenty-seven thousand, eight hundred twenty".