1215530531044 has 48 divisors (see below), whose sum is σ = 2173223475136. Its totient is φ = 594740361600.

The previous prime is 1215530531027. The next prime is 1215530531063. The reversal of 1215530531044 is 4401350355121.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 30572602 + ... + 30612334.

Almost surely, 2^{1215530531044} is an apocalyptic number.

It is an amenable number.

1215530531044 is a deficient number, since it is larger than the sum of its proper divisors (957692944092).

1215530531044 is a wasteful number, since it uses less digits than its factorization.

1215530531044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40556 (or 40554 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 1215530531044 its reverse (4401350355121), we get a palindrome (5616880886165).

The spelling of 1215530531044 in words is "one trillion, two hundred fifteen billion, five hundred thirty million, five hundred thirty-one thousand, forty-four".