1213441503545 has 8 divisors (see below), whose sum is σ = 1456231852680. Its totient is φ = 970685170560.

The previous prime is 1213441503499. The next prime is 1213441503563. The reversal of 1213441503545 is 5453051443121.

It can be written as a sum of positive squares in 4 ways, for example, as 90560068624 + 1122881434921 = 300932^2 + 1059661^2 .

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

It is not a de Polignac number, because 1213441503545 - 2⁸ = 1213441503289 is a prime.

It is a super-3 number, since 3×1213441503545³ (a number of 37 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213441503499 and 1213441503508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8425490 + ... + 8568299.

It is an arithmetic number, because the mean of its divisors is an integer number (182028981585).

Almost surely, 2^{1213441503545} is an apocalyptic number.

It is an amenable number.

1213441503545 is a deficient number, since it is larger than the sum of its proper divisors (242790349135).

1213441503545 is a wasteful number, since it uses less digits than its factorization.

1213441503545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17008075.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 1213441503545 its reverse (5453051443121), we get a palindrome (6666492946666).

The spelling of 1213441503545 in words is "one trillion, two hundred thirteen billion, four hundred forty-one million, five hundred three thousand, five hundred forty-five".