231321240400 has 30 divisors (see below), whose sum is σ = 555749281022. Its totient is φ = 92528496000.

The previous prime is 231321240383. The next prime is 231321240401. The reversal of 231321240400 is 4042123132.

It can be written as a sum of positive squares in 3 ways, for example, as 44838909504 + 186482330896 = 211752^2 + 431836^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321240401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289151151 + ... + 289151950.

Almost surely, 2^231321240400 is an apocalyptic number.

231321240400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231321240400 is an abundant number, since it is smaller than the sum of its proper divisors (324428040622).

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

231321240400 is a wasteful number, since it uses less digits than its factorization.

231321240400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578303119 (or 578303108 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 231321240400 its reverse (4042123132), we get a palindrome (235363363532).

The spelling of 231321240400 in words is "two hundred thirty-one billion, three hundred twenty-one million, two hundred forty thousand, four hundred".