231201244420 has 24 divisors (see below), whose sum is σ = 487327541400. Its totient is φ = 92136701952.

The previous prime is 231201244369. The next prime is 231201244433. The reversal of 231201244420 is 24442102132.

It can be written as a sum of positive squares in 4 ways, for example, as 39131169856 + 192070074564 = 197816^2 + 438258^2 .

It is a super-2 number, since 2×231201244420² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21481725 + ... + 21492484.

It is an arithmetic number, because the mean of its divisors is an integer number (20305314225).

Almost surely, 2^231201244420 is an apocalyptic number.

231201244420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231201244420 is an abundant number, since it is smaller than the sum of its proper divisors (256126296980).

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

231201244420 is a wasteful number, since it uses less digits than its factorization.

231201244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42974487 (or 42974485 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 231201244420 its reverse (24442102132), we get a palindrome (255643346552).

The spelling of 231201244420 in words is "two hundred thirty-one billion, two hundred one million, two hundred forty-four thousand, four hundred twenty".