8220405187 has 2 divisors, whose sum is σ = 8220405188. Its totient is φ = 8220405186.

The previous prime is 8220405133. The next prime is 8220405211. The reversal of 8220405187 is 7815040228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8220405187 - 2³¹ = 6072921539 is a prime.

It is a super-2 number, since 2×8220405187² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8220405287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110202593 + 4110202594.

It is an arithmetic number, because the mean of its divisors is an integer number (4110202594).

Almost surely, 2^8220405187 is an apocalyptic number.

8220405187 is a deficient number, since it is larger than the sum of its proper divisors (1).

8220405187 is an equidigital number, since it uses as much as digits as its factorization.

8220405187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 8220405187 is about 90666.4501731484. The cubic root of 8220405187 is about 2018.2009590023.

The spelling of 8220405187 in words is "eight billion, two hundred twenty million, four hundred five thousand, one hundred eighty-seven".