15221212481 has 8 divisors (see below), whose sum is σ = 15899385024. Its totient is φ = 14544405040.

The previous prime is 15221212441. The next prime is 15221212483. The reversal of 15221212481 is 18421212251.

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 15221212481 - 2¹⁴ = 15221196097 is a prime.

It is a super-2 number, since 2×15221212481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15221212483) 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 7 ways as a sum of consecutive naturals, for example, 318446 + ... + 363111.

It is an arithmetic number, because the mean of its divisors is an integer number (1987423128).

Almost surely, 2^15221212481 is an apocalyptic number.

It is an amenable number.

15221212481 is a deficient number, since it is larger than the sum of its proper divisors (678172543).

15221212481 is an equidigital number, since it uses as much as digits as its factorization.

15221212481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682551.

The product of its digits is 2560, while the sum is 29.

The spelling of 15221212481 in words is "fifteen billion, two hundred twenty-one million, two hundred twelve thousand, four hundred eighty-one".