201310220320 has 96 divisors (see below), whose sum is σ = 519088046400. Its totient is φ = 73167498240.

The previous prime is 201310220311. The next prime is 201310220329. The reversal of 201310220320 is 23022013102.

It is an interprime number because it is at equal distance from previous prime (201310220311) and next prime (201310220329).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 201310220294 and 201310220303.

It is not an unprimeable number, because it can be changed into a prime (201310220329) 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, 3666994 + ... + 3721486.

It is an arithmetic number, because the mean of its divisors is an integer number (5407167150).

Almost surely, 2^201310220320 is an apocalyptic number.

201310220320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201310220320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259544023200).

201310220320 is an abundant number, since it is smaller than the sum of its proper divisors (317777826080).

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

201310220320 is a wasteful number, since it uses less digits than its factorization.

201310220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56618 (or 56610 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 201310220320 its reverse (23022013102), we get a palindrome (224332233422).

The spelling of 201310220320 in words is "two hundred one billion, three hundred ten million, two hundred twenty thousand, three hundred twenty".