1225243544213 has 48 divisors (see below), whose sum is σ = 1445799425280. Its totient is φ = 1028857220352.

The previous prime is 1225243544177. The next prime is 1225243544221. The reversal of 1225243544213 is 3124453425221.

It is not a de Polignac number, because 1225243544213 - 2¹⁴ = 1225243527829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225243544243) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 32590895 + ... + 32628467.

It is an arithmetic number, because the mean of its divisors is an integer number (30120821360).

Almost surely, 2^{1225243544213} is an apocalyptic number.

1225243544213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1225243544213 is a deficient number, since it is larger than the sum of its proper divisors (220555881067).

1225243544213 is a wasteful number, since it uses less digits than its factorization.

1225243544213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37758 (or 37705 counting only the distinct ones).

The product of its digits is 230400, while the sum is 38.

Adding to 1225243544213 its reverse (3124453425221), we get a palindrome (4349696969434).

The spelling of 1225243544213 in words is "one trillion, two hundred twenty-five billion, two hundred forty-three million, five hundred forty-four thousand, two hundred thirteen".