1215545503425 has 48 divisors (see below), whose sum is σ = 2192522437440. Its totient is φ = 589323040000.

The previous prime is 1215545503421. The next prime is 1215545503433. The reversal of 1215545503425 is 5243055455121.

It is a happy number.

It is not a de Polignac number, because 1215545503425 - 2² = 1215545503421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215545503421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22826731 + ... + 22879919.

It is an arithmetic number, because the mean of its divisors is an integer number (45677550780).

Almost surely, 2^{1215545503425} is an apocalyptic number.

1215545503425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215545503425 is a deficient number, since it is larger than the sum of its proper divisors (976976934015).

1215545503425 is a wasteful number, since it uses less digits than its factorization.

1215545503425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80914 (or 80909 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 1215545503425 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, five hundred three thousand, four hundred twenty-five".