16225228909 has 4 divisors (see below), whose sum is σ = 16225483900. Its totient is φ = 16224973920.

The previous prime is 16225228907. The next prime is 16225228913. The reversal of 16225228909 is 90982252261.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90982252261 = 107 ⋅850301423.

It can be written as a sum of positive squares in 2 ways, for example, as 6786134884 + 9439094025 = 82378^2 + 97155^2 .

It is a cyclic number.

It is not a de Polignac number, because 16225228909 - 2¹ = 16225228907 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 (16225228907) 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, 55567 + ... + 188515.

It is an arithmetic number, because the mean of its divisors is an integer number (4056370975).

Almost surely, 2^16225228909 is an apocalyptic number.

It is an amenable number.

16225228909 is a deficient number, since it is larger than the sum of its proper divisors (254991).

16225228909 is a wasteful number, since it uses less digits than its factorization.

16225228909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254990.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 16225228909 in words is "sixteen billion, two hundred twenty-five million, two hundred twenty-eight thousand, nine hundred nine".