231311231400 has 192 divisors, whose sum is σ = 737019345600. Its totient is φ = 59989248000.

The previous prime is 231311231399. The next prime is 231311231407. The reversal of 231311231400 is 4132113132.

It is not an unprimeable number, because it can be changed into a prime (231311231407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3221895 + ... + 3292905.

It is an arithmetic number, because the mean of its divisors is an integer number (3838642425).

Almost surely, 2^231311231400 is an apocalyptic number.

231311231400 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 231311231400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368509672800).

231311231400 is an abundant number, since it is smaller than the sum of its proper divisors (505708114200).

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

231311231400 is a wasteful number, since it uses less digits than its factorization.

231311231400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71180 (or 71171 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231311231400 its reverse (4132113132), we get a palindrome (235443344532).

The spelling of 231311231400 in words is "two hundred thirty-one billion, three hundred eleven million, two hundred thirty-one thousand, four hundred".