231301202220 has 144 divisors (see below), whose sum is σ = 772828422912. Its totient is φ = 55528571520.

The previous prime is 231301202123. The next prime is 231301202221. The reversal of 231301202220 is 22202103132.

It is a super-2 number, since 2×231301202220² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231301202193 and 231301202202.

It is not an unprimeable number, because it can be changed into a prime (231301202221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 363142 + ... + 771021.

It is an arithmetic number, because the mean of its divisors is an integer number (5366864048).

Almost surely, 2^231301202220 is an apocalyptic number.

231301202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231301202220 is an abundant number, since it is smaller than the sum of its proper divisors (541527220692).

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

231301202220 is a wasteful number, since it uses less digits than its factorization.

231301202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134292 (or 1134287 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231301202220 its reverse (22202103132), we get a palindrome (253503305352).

The spelling of 231301202220 in words is "two hundred thirty-one billion, three hundred one million, two hundred two thousand, two hundred twenty".