1213530055445 has 8 divisors (see below), whose sum is σ = 1456257616344. Its totient is φ = 970809677824.

The previous prime is 1213530055421. The next prime is 1213530055483. The reversal of 1213530055445 is 5445500353121.

It can be written as a sum of positive squares in 4 ways, for example, as 55965361 + 1213474090084 = 7481^2 + 1101578^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213530055445 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213530055399 and 1213530055408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1416884 + ... + 2105853.

It is an arithmetic number, because the mean of its divisors is an integer number (182032202043).

Almost surely, 2^{1213530055445} is an apocalyptic number.

It is an amenable number.

1213530055445 is a deficient number, since it is larger than the sum of its proper divisors (242727560899).

1213530055445 is an equidigital number, since it uses as much as digits as its factorization.

1213530055445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591639.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 1213530055445 in words is "one trillion, two hundred thirteen billion, five hundred thirty million, fifty-five thousand, four hundred forty-five".