1213103430 has 192 divisors, whose sum is σ = 3957078528. Its totient is φ = 250490880.

The previous prime is 1213103429. The next prime is 1213103447. The reversal of 1213103430 is 343013121.

1213103430 is a `hidden beast` number, since 12 + 1 + 310 + 343 + 0 = 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 95 ways as a sum of consecutive naturals, for example, 1337037 + ... + 1337943.

It is an arithmetic number, because the mean of its divisors is an integer number (20609784).

Almost surely, 2^1213103430 is an apocalyptic number.

1213103430 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 1213103430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1978539264).

1213103430 is an abundant number, since it is smaller than the sum of its proper divisors (2743975098).

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

1213103430 is a wasteful number, since it uses less digits than its factorization.

1213103430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213103430 is about 34829.6343650059. The cubic root of 1213103430 is about 1066.5124843336.

Adding to 1213103430 its reverse (343013121), we get a palindrome (1556116551).

The spelling of 1213103430 in words is "one billion, two hundred thirteen million, one hundred three thousand, four hundred thirty".