231201303220 has 96 divisors (see below), whose sum is σ = 530960699808. Its totient is φ = 84227899392.

The previous prime is 231201303211. The next prime is 231201303287. The reversal of 231201303220 is 22303102132.

It can be written as a sum of positive squares in 16 ways, for example, as 8392758544 + 222808544676 = 91612^2 + 472026^2 .

It is a super-2 number, since 2×231201303220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1227582 + ... + 1403338.

It is an arithmetic number, because the mean of its divisors is an integer number (5530840623).

Almost surely, 2^231201303220 is an apocalyptic number.

231201303220 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 231201303220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265480349904).

231201303220 is an abundant number, since it is smaller than the sum of its proper divisors (299759396588).

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

231201303220 is a wasteful number, since it uses less digits than its factorization.

231201303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175909 (or 175907 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 231201303220 its reverse (22303102132), we get a palindrome (253504405352).

The spelling of 231201303220 in words is "two hundred thirty-one billion, two hundred one million, three hundred three thousand, two hundred twenty".