231403244420 has 12 divisors (see below), whose sum is σ = 485946813324. Its totient is φ = 92561297760.

The previous prime is 231403244407. The next prime is 231403244461. The reversal of 231403244420 is 24442304132.

It can be written as a sum of positive squares in 2 ways, for example, as 122533602304 + 108869642116 = 350048^2 + 329954^2 .

It is a super-2 number, since 2×231403244420² (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 3 ways as a sum of consecutive naturals, for example, 5785081091 + ... + 5785081130.

It is an arithmetic number, because the mean of its divisors is an integer number (40495567777).

Almost surely, 2^231403244420 is an apocalyptic number.

231403244420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231403244420 is an abundant number, since it is smaller than the sum of its proper divisors (254543568904).

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

231403244420 is a wasteful number, since it uses less digits than its factorization.

231403244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11570162230 (or 11570162228 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 231403244420 its reverse (24442304132), we get a palindrome (255845548552).

The spelling of 231403244420 in words is "two hundred thirty-one billion, four hundred three million, two hundred forty-four thousand, four hundred twenty".