1423221569 has 16 divisors (see below), whose sum is σ = 1775554560. Its totient is φ = 1108286160.

The previous prime is 1423221557. The next prime is 1423221587. The reversal of 1423221569 is 9651223241.

It is a cyclic number.

It is not a de Polignac number, because 1423221569 - 2¹² = 1423217473 is a prime.

It is a super-2 number, since 2×1423221569² = 4051119268933643522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423221509) 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 15 ways as a sum of consecutive naturals, for example, 135302 + ... + 145440.

It is an arithmetic number, because the mean of its divisors is an integer number (110972160).

Almost surely, 2^1423221569 is an apocalyptic number.

It is an amenable number.

1423221569 is a deficient number, since it is larger than the sum of its proper divisors (352332991).

1423221569 is a wasteful number, since it uses less digits than its factorization.

1423221569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11980.

The product of its digits is 25920, while the sum is 35.

The square root of 1423221569 is about 37725.6089281538. The cubic root of 1423221569 is about 1124.8402259353.

The spelling of 1423221569 in words is "one billion, four hundred twenty-three million, two hundred twenty-one thousand, five hundred sixty-nine".