8655421431 has 16 divisors (see below), whose sum is σ = 11598163200. Its totient is φ = 5741552448.

The previous prime is 8655421381. The next prime is 8655421447. The reversal of 8655421431 is 1341245568.

It is not a de Polignac number, because 8655421431 - 2⁷ = 8655421303 is a prime.

It is a super-2 number, since 2×8655421431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8655421431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8655421471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494355 + ... + 511563.

It is an arithmetic number, because the mean of its divisors is an integer number (724885200).

Almost surely, 2^8655421431 is an apocalyptic number.

8655421431 is a deficient number, since it is larger than the sum of its proper divisors (2942741769).

8655421431 is a wasteful number, since it uses less digits than its factorization.

8655421431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18038.

The product of its digits is 115200, while the sum is 39.

The square root of 8655421431 is about 93034.5174169243. The cubic root of 8655421431 is about 2053.1912564881.

Adding to 8655421431 its reverse (1341245568), we get a palindrome (9996666999).

The spelling of 8655421431 in words is "eight billion, six hundred fifty-five million, four hundred twenty-one thousand, four hundred thirty-one".