8227645631 has 4 divisors (see below), whose sum is σ = 8235611472. Its totient is φ = 8219679792.

The previous prime is 8227645579. The next prime is 8227645649. The reversal of 8227645631 is 1365467228.

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 8227645631 - 2¹⁸ = 8227383487 is a prime.

It is a super-2 number, since 2×8227645631² (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 (8227645661) 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, 3981371 + ... + 3983436.

It is an arithmetic number, because the mean of its divisors is an integer number (2058902868).

Almost surely, 2^8227645631 is an apocalyptic number.

8227645631 is a deficient number, since it is larger than the sum of its proper divisors (7965841).

8227645631 is a wasteful number, since it uses less digits than its factorization.

8227645631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965840.

The product of its digits is 483840, while the sum is 44.

The square root of 8227645631 is about 90706.3703992173. The cubic root of 8227645631 is about 2018.7933216479.

The spelling of 8227645631 in words is "eight billion, two hundred twenty-seven million, six hundred forty-five thousand, six hundred thirty-one".