15321260221 has 8 divisors (see below), whose sum is σ = 15538100864. Its totient is φ = 15104607840.

The previous prime is 15321260219. The next prime is 15321260233. The reversal of 15321260221 is 12206212351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15321260221 - 2¹ = 15321260219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15321260281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121066 + ... + 212836.

It is an arithmetic number, because the mean of its divisors is an integer number (1942262608).

Almost surely, 2^15321260221 is an apocalyptic number.

It is an amenable number.

15321260221 is a deficient number, since it is larger than the sum of its proper divisors (216840643).

15321260221 is an equidigital number, since it uses as much as digits as its factorization.

15321260221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94131.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 15321260221 its reverse (12206212351), we get a palindrome (27527472572).

The spelling of 15321260221 in words is "fifteen billion, three hundred twenty-one million, two hundred sixty thousand, two hundred twenty-one".