15530221241 has 16 divisors (see below), whose sum is σ = 15902515200. Its totient is φ = 15162767568.

The previous prime is 15530221237. The next prime is 15530221247. The reversal of 15530221241 is 14212203551.

It is a cyclic number.

It is not a de Polignac number, because 15530221241 - 2² = 15530221237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15530221241.

It is not an unprimeable number, because it can be changed into a prime (15530221247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10731980 + ... + 10733426.

It is an arithmetic number, because the mean of its divisors is an integer number (993907200).

Almost surely, 2^15530221241 is an apocalyptic number.

It is an amenable number.

15530221241 is a deficient number, since it is larger than the sum of its proper divisors (372293959).

15530221241 is a wasteful number, since it uses less digits than its factorization.

15530221241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 15530221241 its reverse (14212203551), we get a palindrome (29742424792).

The spelling of 15530221241 in words is "fifteen billion, five hundred thirty million, two hundred twenty-one thousand, two hundred forty-one".