1215444535225 has 24 divisors (see below), whose sum is σ = 1626909888960. Its totient is φ = 898007584320.

The previous prime is 1215444535187. The next prime is 1215444535237. The reversal of 1215444535225 is 5225354445121.

It is not a de Polignac number, because 1215444535225 - 2³⁹ = 665688721337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36428439 + ... + 36461788.

It is an arithmetic number, because the mean of its divisors is an integer number (67787912040).

Almost surely, 2^{1215444535225} is an apocalyptic number.

It is an amenable number.

1215444535225 is a deficient number, since it is larger than the sum of its proper divisors (411465353735).

1215444535225 is a wasteful number, since it uses less digits than its factorization.

1215444535225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72890289 (or 72890284 counting only the distinct ones).

The product of its digits is 960000, while the sum is 43.

The spelling of 1215444535225 in words is "one trillion, two hundred fifteen billion, four hundred forty-four million, five hundred thirty-five thousand, two hundred twenty-five".