15225401215504 has 20 divisors (see below), whose sum is σ = 29499521101776. Its totient is φ = 7612621576352.

The previous prime is 15225401215481. The next prime is 15225401215613. The reversal of 15225401215504 is 40551210452251.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334294 + ... + 6447349.

Almost surely, 2^{15225401215504} is an apocalyptic number.

It is an amenable number.

15225401215504 is a deficient number, since it is larger than the sum of its proper divisors (14274119886272).

15225401215504 is an equidigital number, since it uses as much as digits as its factorization.

15225401215504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9878934 (or 9878928 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 37.

Adding to 15225401215504 its reverse (40551210452251), we get a palindrome (55776611667755).

The spelling of 15225401215504 in words is "fifteen trillion, two hundred twenty-five billion, four hundred one million, two hundred fifteen thousand, five hundred four".