2205172807 has 2 divisors, whose sum is σ = 2205172808. Its totient is φ = 2205172806.

The previous prime is 2205172793. The next prime is 2205172841. The reversal of 2205172807 is 7082715022.

It is an a-pointer prime, because the next prime (2205172841) can be obtained adding 2205172807 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2205172807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2205172897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102586403 + 1102586404.

It is an arithmetic number, because the mean of its divisors is an integer number (1102586404).

Almost surely, 2^2205172807 is an apocalyptic number.

2205172807 is a deficient number, since it is larger than the sum of its proper divisors (1).

2205172807 is an equidigital number, since it uses as much as digits as its factorization.

2205172807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 2205172807 is about 46959.2675304886. The cubic root of 2205172807 is about 1301.6099987480.

Adding to 2205172807 its reverse (7082715022), we get a palindrome (9287887829).

The spelling of 2205172807 in words is "two billion, two hundred five million, one hundred seventy-two thousand, eight hundred seven".