1213323524 has 48 divisors (see below), whose sum is σ = 2580842880. Its totient is φ = 487226880.

The previous prime is 1213323521. The next prime is 1213323533. The reversal of 1213323524 is 4253233121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1213323493 and 1213323502.

It is not an unprimeable number, because it can be changed into a prime (1213323521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103439 + ... + 114569.

It is an arithmetic number, because the mean of its divisors is an integer number (53767560).

Almost surely, 2^1213323524 is an apocalyptic number.

1213323524 is a gapful number since it is divisible by the number (14) 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 1213323524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290421440).

1213323524 is an abundant number, since it is smaller than the sum of its proper divisors (1367519356).

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

1213323524 is a wasteful number, since it uses less digits than its factorization.

1213323524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388 (or 11386 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 1213323524 is about 34832.7938012443. The cubic root of 1213323524 is about 1066.5769797422.

Adding to 1213323524 its reverse (4253233121), we get a palindrome (5466556645).

The spelling of 1213323524 in words is "one billion, two hundred thirteen million, three hundred twenty-three thousand, five hundred twenty-four".