201220320 has 96 divisors (see below), whose sum is σ = 724405248. Its totient is φ = 45992448.

The previous prime is 201220309. The next prime is 201220321. The reversal of 201220320 is 23022102.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 201220296 and 201220305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26584 + ... + 33303.

It is an arithmetic number, because the mean of its divisors is an integer number (7545888).

Almost surely, 2^201220320 is an apocalyptic number.

201220320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220320 is an abundant number, since it is smaller than the sum of its proper divisors (523184928).

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

201220320 is a wasteful number, since it uses less digits than its factorization.

201220320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59912 (or 59904 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 201220320 is about 14185.2148379924. The cubic root of 201220320 is about 585.9905491454.

Adding to 201220320 its reverse (23022102), we get a palindrome (224242422).

The spelling of 201220320 in words is "two hundred one million, two hundred twenty thousand, three hundred twenty".