8218220503 has 2 divisors, whose sum is σ = 8218220504. Its totient is φ = 8218220502.

The previous prime is 8218220411. The next prime is 8218220509. The reversal of 8218220503 is 3050228128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8218220503 - 2¹³ = 8218212311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8218220509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109110251 + 4109110252.

It is an arithmetic number, because the mean of its divisors is an integer number (4109110252).

Almost surely, 2^8218220503 is an apocalyptic number.

8218220503 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218220503 is an equidigital number, since it uses as much as digits as its factorization.

8218220503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 8218220503 is about 90654.4014540938. The cubic root of 8218220503 is about 2018.0221550830.

The spelling of 8218220503 in words is "eight billion, two hundred eighteen million, two hundred twenty thousand, five hundred three".