231401400 has 96 divisors (see below), whose sum is σ = 723904560. Its totient is φ = 61143040.

The previous prime is 231401383. The next prime is 231401407. The reversal of 231401400 is 4104132.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 231401400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231401407) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 66094 + ... + 69506.

Almost surely, 2^231401400 is an apocalyptic number.

231401400 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 231401400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361952280).

231401400 is an abundant number, since it is smaller than the sum of its proper divisors (492503160).

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

231401400 is a wasteful number, since it uses less digits than its factorization.

231401400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545 (or 3536 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 231401400 is about 15211.8835125700. The cubic root of 231401400 is about 613.9344361587.

Adding to 231401400 its reverse (4104132), we get a palindrome (235505532).

The spelling of 231401400 in words is "two hundred thirty-one million, four hundred one thousand, four hundred".