1231344450 has 192 divisors, whose sum is σ = 3901536000. Its totient is φ = 279728640.

The previous prime is 1231344407. The next prime is 1231344461. The reversal of 1231344450 is 544431321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2163766 + ... + 2164334.

It is an arithmetic number, because the mean of its divisors is an integer number (20320500).

Almost surely, 2^1231344450 is an apocalyptic number.

1231344450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231344450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1950768000).

1231344450 is an abundant number, since it is smaller than the sum of its proper divisors (2670191550).

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

1231344450 is a wasteful number, since it uses less digits than its factorization.

1231344450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1231344450 is about 35090.5179500104. The cubic root of 1231344450 is about 1071.8315067336.

Adding to 1231344450 its reverse (544431321), we get a palindrome (1775775771).

The spelling of 1231344450 in words is "one billion, two hundred thirty-one million, three hundred forty-four thousand, four hundred fifty".