1231423200 has 432 divisors, whose sum is σ = 5067238176. Its totient is φ = 275558400.

The previous prime is 1231423189. The next prime is 1231423213. The reversal of 1231423200 is 23241321.

1231423200 is a `hidden beast` number, since 12 + 31 + 423 + 200 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2670970 + ... + 2671430.

It is an arithmetic number, because the mean of its divisors is an integer number (11729718).

Almost surely, 2^1231423200 is an apocalyptic number.

1231423200 is a gapful number since it is divisible by the number (10) 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 1231423200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2533619088).

1231423200 is an abundant number, since it is smaller than the sum of its proper divisors (3835814976).

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

1231423200 is a wasteful number, since it uses less digits than its factorization.

1231423200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1231423200 is about 35091.6400300698. The cubic root of 1231423200 is about 1071.8543557239.

Adding to 1231423200 its reverse (23241321), we get a palindrome (1254664521).

The spelling of 1231423200 in words is "one billion, two hundred thirty-one million, four hundred twenty-three thousand, two hundred".