1213135352 has 96 divisors (see below), whose sum is σ = 2714796000. Its totient is φ = 504810240.

The previous prime is 1213135333. The next prime is 1213135379. The reversal of 1213135352 is 2535313121.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

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, 1874693 + ... + 1875339.

It is an arithmetic number, because the mean of its divisors is an integer number (28279125).

Almost surely, 2^1213135352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213135352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1357398000).

1213135352 is an abundant number, since it is smaller than the sum of its proper divisors (1501660648).

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

1213135352 is a wasteful number, since it uses less digits than its factorization.

1213135352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 822 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 1213135352 is about 34830.0926211803. The cubic root of 1213135352 is about 1066.5218391042.

Adding to 1213135352 its reverse (2535313121), we get a palindrome (3748448473).

The spelling of 1213135352 in words is "one billion, two hundred thirteen million, one hundred thirty-five thousand, three hundred fifty-two".