1215441150225 has 12 divisors (see below), whose sum is σ = 2009529368496. Its totient is φ = 648235280080.

The previous prime is 1215441150191. The next prime is 1215441150241. The reversal of 1215441150225 is 5220511445121.

It is not a de Polignac number, because 1215441150225 - 2³⁷ = 1078002196753 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 8102940927 + ... + 8102941076.

It is an arithmetic number, because the mean of its divisors is an integer number (167460780708).

Almost surely, 2^{1215441150225} is an apocalyptic number.

1215441150225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215441150225 is a deficient number, since it is larger than the sum of its proper divisors (794088218271).

1215441150225 is a wasteful number, since it uses less digits than its factorization.

1215441150225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16205882016 (or 16205882011 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 33.

Adding to 1215441150225 its reverse (5220511445121), we get a palindrome (6435952595346).

The spelling of 1215441150225 in words is "one trillion, two hundred fifteen billion, four hundred forty-one million, one hundred fifty thousand, two hundred twenty-five".