15221204241 has 4 divisors (see below), whose sum is σ = 20294938992. Its totient is φ = 10147469492.

The previous prime is 15221204221. The next prime is 15221204287. The reversal of 15221204241 is 14240212251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15221204241 - 2²² = 15217009937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15221204221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2536867371 + ... + 2536867376.

It is an arithmetic number, because the mean of its divisors is an integer number (5073734748).

Almost surely, 2^15221204241 is an apocalyptic number.

It is an amenable number.

15221204241 is a deficient number, since it is larger than the sum of its proper divisors (5073734751).

15221204241 is an equidigital number, since it uses as much as digits as its factorization.

15221204241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073734750.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 15221204241 its reverse (14240212251), we get a palindrome (29461416492).

The spelling of 15221204241 in words is "fifteen billion, two hundred twenty-one million, two hundred four thousand, two hundred forty-one".