1215531003145 has 16 divisors (see below), whose sum is σ = 1535958046080. Its totient is φ = 920914272000.

The previous prime is 1215531003139. The next prime is 1215531003233. The reversal of 1215531003145 is 5413001355121.

It is not a de Polignac number, because 1215531003145 - 2²¹ = 1215528905993 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2027056 + ... + 2557345.

It is an arithmetic number, because the mean of its divisors is an integer number (95997377880).

Almost surely, 2^{1215531003145} is an apocalyptic number.

It is an amenable number.

1215531003145 is a deficient number, since it is larger than the sum of its proper divisors (320427042935).

1215531003145 is a wasteful number, since it uses less digits than its factorization.

1215531003145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587216.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 1215531003145 its reverse (5413001355121), we get a palindrome (6628532358266).

The spelling of 1215531003145 in words is "one trillion, two hundred fifteen billion, five hundred thirty-one million, three thousand, one hundred forty-five".