1213523330535 has 24 divisors (see below), whose sum is σ = 2104166741040. Its totient is φ = 646988965632.

The previous prime is 1213523330527. The next prime is 1213523330609. The reversal of 1213523330535 is 5350333253121.

It is a happy number.

1213523330535 is a `hidden beast` number, since 1 + 2 + 13 + 52 + 33 + 30 + 535 = 666.

It is not a de Polignac number, because 1213523330535 - 2³ = 1213523330527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213523330535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4523965 + ... + 4784694.

It is an arithmetic number, because the mean of its divisors is an integer number (87673614210).

Almost surely, 2^{1213523330535} is an apocalyptic number.

1213523330535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1213523330535 is a deficient number, since it is larger than the sum of its proper divisors (890643410505).

1213523330535 is a wasteful number, since it uses less digits than its factorization.

1213523330535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311567 (or 9311564 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 36.

Adding to 1213523330535 its reverse (5350333253121), we get a palindrome (6563856583656).

The spelling of 1213523330535 in words is "one trillion, two hundred thirteen billion, five hundred twenty-three million, three hundred thirty thousand, five hundred thirty-five".