15221268427 has 8 divisors (see below), whose sum is σ = 16124524416. Its totient is φ = 14318888832.

The previous prime is 15221268373. The next prime is 15221268511. The reversal of 15221268427 is 72486212251.

It is a happy number.

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 15221268427 - 2¹⁹ = 15220744139 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 15221268427.

It is not an unprimeable number, because it can be changed into a prime (15224268427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183163 + ... + 252964.

It is an arithmetic number, because the mean of its divisors is an integer number (2015565552).

Almost surely, 2^15221268427 is an apocalyptic number.

15221268427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

15221268427 is a deficient number, since it is larger than the sum of its proper divisors (903255989).

15221268427 is a wasteful number, since it uses less digits than its factorization.

15221268427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438197.

The product of its digits is 107520, while the sum is 40.

The spelling of 15221268427 in words is "fifteen billion, two hundred twenty-one million, two hundred sixty-eight thousand, four hundred twenty-seven".