1213544304520 has 32 divisors (see below), whose sum is σ = 2771228044800. Its totient is φ = 478172680128.

The previous prime is 1213544304509. The next prime is 1213544304521. The reversal of 1213544304520 is 254034453121.

It is not an unprimeable number, because it can be changed into a prime (1213544304521) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 226404840 + ... + 226410199.

It is an arithmetic number, because the mean of its divisors is an integer number (86600876400).

Almost surely, 2^{1213544304520} is an apocalyptic number.

1213544304520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213544304520 is an abundant number, since it is smaller than the sum of its proper divisors (1557683740280).

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

1213544304520 is a wasteful number, since it uses less digits than its factorization.

1213544304520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452815117 (or 452815113 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 1213544304520 its reverse (254034453121), we get a palindrome (1467578757641).

The spelling of 1213544304520 in words is "one trillion, two hundred thirteen billion, five hundred forty-four million, three hundred four thousand, five hundred twenty".