1808215223 has 2 divisors, whose sum is σ = 1808215224. Its totient is φ = 1808215222.

The previous prime is 1808215193. The next prime is 1808215243. The reversal of 1808215223 is 3225128081.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1808215223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1808215223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1808215243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904107611 + 904107612.

It is an arithmetic number, because the mean of its divisors is an integer number (904107612).

Almost surely, 2^1808215223 is an apocalyptic number.

1808215223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1808215223 is an equidigital number, since it uses as much as digits as its factorization.

1808215223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1808215223 is about 42523.1139852199. The cubic root of 1808215223 is about 1218.2882073275.

The spelling of 1808215223 in words is "one billion, eight hundred eight million, two hundred fifteen thousand, two hundred twenty-three".