15222220657 has 4 divisors (see below), whose sum is σ = 17396823616. Its totient is φ = 13047617700.

The previous prime is 15222220619. The next prime is 15222220693. The reversal of 15222220657 is 75602222251.

15222220657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75602222251 = 19 ⋅3979064329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15222220657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15222220697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087301469 + ... + 1087301482.

It is an arithmetic number, because the mean of its divisors is an integer number (4349205904).

Almost surely, 2^15222220657 is an apocalyptic number.

It is an amenable number.

15222220657 is a deficient number, since it is larger than the sum of its proper divisors (2174602959).

15222220657 is an equidigital number, since it uses as much as digits as its factorization.

15222220657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174602958.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 15222220657 in words is "fifteen billion, two hundred twenty-two million, two hundred twenty thousand, six hundred fifty-seven".