8425555247 has 4 divisors (see below), whose sum is σ = 8791883760. Its totient is φ = 8059226736.

The previous prime is 8425555231. The next prime is 8425555253. The reversal of 8425555247 is 7425555248.

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

It is a cyclic number.

It is not a de Polignac number, because 8425555247 - 2⁴ = 8425555231 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 (8425555207) 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, 183164222 + ... + 183164267.

It is an arithmetic number, because the mean of its divisors is an integer number (2197970940).

Almost surely, 2^8425555247 is an apocalyptic number.

8425555247 is a deficient number, since it is larger than the sum of its proper divisors (366328513).

8425555247 is a wasteful number, since it uses less digits than its factorization.

8425555247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366328512.

The product of its digits is 2240000, while the sum is 47.

The square root of 8425555247 is about 91790.8233267357. The cubic root of 8425555247 is about 2034.8520758484.

Subtracting from 8425555247 its reverse (7425555248), we obtain a palindrome (999999999).

The spelling of 8425555247 in words is "eight billion, four hundred twenty-five million, five hundred fifty-five thousand, two hundred forty-seven".