231421023042400 has 144 divisors (see below), whose sum is σ = 578160054388224. Its totient is φ = 90405496097280.

The previous prime is 231421023042373. The next prime is 231421023042409. The reversal of 231421023042400 is 4240320124132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231421023042409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 309467349 + ... + 310214251.

It is an arithmetic number, because the mean of its divisors is an integer number (4015000377696).

Almost surely, 2^{231421023042400} is an apocalyptic number.

231421023042400 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 231421023042400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289080027194112).

231421023042400 is an abundant number, since it is smaller than the sum of its proper divisors (346739031345824).

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

231421023042400 is a wasteful number, since it uses less digits than its factorization.

231421023042400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755973 (or 755960 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 231421023042400 its reverse (4240320124132), we get a palindrome (235661343166532).

The spelling of 231421023042400 in words is "two hundred thirty-one trillion, four hundred twenty-one billion, twenty-three million, forty-two thousand, four hundred".