16314377221 has 4 divisors (see below), whose sum is σ = 16314680844. Its totient is φ = 16314073600.

The previous prime is 16314377179. The next prime is 16314377237. The reversal of 16314377221 is 12277341361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14372652996 + 1941724225 = 119886^2 + 44065^2 .

It is a cyclic number.

It is not a de Polignac number, because 16314377221 - 2¹¹ = 16314375173 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 (16314377251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47170 + ... + 186691.

It is an arithmetic number, because the mean of its divisors is an integer number (4078670211).

Almost surely, 2^16314377221 is an apocalyptic number.

It is an amenable number.

16314377221 is a deficient number, since it is larger than the sum of its proper divisors (303623).

16314377221 is an equidigital number, since it uses as much as digits as its factorization.

16314377221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303622.

The product of its digits is 42336, while the sum is 37.

The spelling of 16314377221 in words is "sixteen billion, three hundred fourteen million, three hundred seventy-seven thousand, two hundred twenty-one".