1215503515025 has 12 divisors (see below), whose sum is σ = 1507240351872. Its totient is φ = 972392493840.

The previous prime is 1215503515021. The next prime is 1215503515043. The reversal of 1215503515025 is 5205153055121.

It is not a de Polignac number, because 1215503515025 - 2² = 1215503515021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215503515021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2906264 + ... + 3298086.

It is an arithmetic number, because the mean of its divisors is an integer number (125603362656).

Almost surely, 2^{1215503515025} is an apocalyptic number.

It is an amenable number.

1215503515025 is a deficient number, since it is larger than the sum of its proper divisors (291736836847).

1215503515025 is a wasteful number, since it uses less digits than its factorization.

1215503515025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515920 (or 515915 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 35.

The spelling of 1215503515025 in words is "one trillion, two hundred fifteen billion, five hundred three million, five hundred fifteen thousand, twenty-five".