8255420109 has 6 divisors (see below), whose sum is σ = 11924495726. Its totient is φ = 5503613400.

The previous prime is 8255420093. The next prime is 8255420141. The reversal of 8255420109 is 9010245528.

8255420109 is a `hidden beast` number, since 8 + 2 + 5 + 542 + 0 + 109 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4798332900 + 3457087209 = 69270^2 + 58797^2 .

It is not a de Polignac number, because 8255420109 - 2⁴ = 8255420093 is a prime.

It is a super-2 number, since 2×8255420109² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8255420149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 458634442 + ... + 458634459.

Almost surely, 2^8255420109 is an apocalyptic number.

It is an amenable number.

8255420109 is a deficient number, since it is larger than the sum of its proper divisors (3669075617).

8255420109 is a wasteful number, since it uses less digits than its factorization.

8255420109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917268907 (or 917268904 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 8255420109 is about 90859.3424420406. The cubic root of 8255420109 is about 2021.0624177114.

The spelling of 8255420109 in words is "eight billion, two hundred fifty-five million, four hundred twenty thousand, one hundred nine".