231210223400 has 48 divisors (see below), whose sum is σ = 578914835100. Its totient is φ = 85369927680.

The previous prime is 231210223379. The next prime is 231210223411. The reversal of 231210223400 is 4322012132.

It can be written as a sum of positive squares in 6 ways, for example, as 109957233604 + 121252989796 = 331598^2 + 348214^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44460905 + ... + 44466104.

Almost surely, 2^231210223400 is an apocalyptic number.

231210223400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231210223400 is an abundant number, since it is smaller than the sum of its proper divisors (347704611700).

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

231210223400 is a wasteful number, since it uses less digits than its factorization.

231210223400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88927038 (or 88927029 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231210223400 its reverse (4322012132), we get a palindrome (235532235532).

The spelling of 231210223400 in words is "two hundred thirty-one billion, two hundred ten million, two hundred twenty-three thousand, four hundred".