8157223 has 2 divisors, whose sum is σ = 8157224. Its totient is φ = 8157222.

The previous prime is 8157221. The next prime is 8157241. The reversal of 8157223 is 3227518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8157223 - 2¹ = 8157221 is a prime.

Together with 8157221, it forms a pair of twin primes.

8157223 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8157191 and 8157200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8157221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4078611 + 4078612.

It is an arithmetic number, because the mean of its divisors is an integer number (4078612).

Almost surely, 2^8157223 is an apocalyptic number.

8157223 is a deficient number, since it is larger than the sum of its proper divisors (1).

8157223 is an equidigital number, since it uses as much as digits as its factorization.

8157223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 8157223 is about 2856.0852578311. The cubic root of 8157223 is about 201.3017011569.

The spelling of 8157223 in words is "eight million, one hundred fifty-seven thousand, two hundred twenty-three".