1215323351541 has 16 divisors (see below), whose sum is σ = 1938977427520. Its totient is φ = 747891293040.

The previous prime is 1215323351531. The next prime is 1215323351563. The reversal of 1215323351541 is 1451533235121.

It is a happy number.

1215323351541 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 32 + 33 + 51 + 541 = 666.

It is not a de Polignac number, because 1215323351541 - 2⁶ = 1215323351477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1215323351496 and 1215323351505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215323351531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1731229495 + ... + 1731230196.

It is an arithmetic number, because the mean of its divisors is an integer number (121186089220).

Almost surely, 2^{1215323351541} is an apocalyptic number.

It is an amenable number.

1215323351541 is a deficient number, since it is larger than the sum of its proper divisors (723654075979).

1215323351541 is a wasteful number, since it uses less digits than its factorization.

1215323351541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462459713 (or 3462459707 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

Adding to 1215323351541 its reverse (1451533235121), we get a palindrome (2666856586662).

The spelling of 1215323351541 in words is "one trillion, two hundred fifteen billion, three hundred twenty-three million, three hundred fifty-one thousand, five hundred forty-one".