2005445501 has 2 divisors, whose sum is σ = 2005445502. Its totient is φ = 2005445500.

The previous prime is 2005445483. The next prime is 2005445503. The reversal of 2005445501 is 1055445002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1797336025 + 208109476 = 42395^2 + 14426^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005445501 - 2¹⁴ = 2005429117 is a prime.

It is a super-2 number, since 2×2005445501² = 8043623314962282002, which contains 22 as substring.

Together with 2005445503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2005445503) 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, 1002722750 + 1002722751.

It is an arithmetic number, because the mean of its divisors is an integer number (1002722751).

Almost surely, 2^2005445501 is an apocalyptic number.

It is an amenable number.

2005445501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2005445501 is an equidigital number, since it uses as much as digits as its factorization.

2005445501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2005445501 is about 44782.2007163560. The cubic root of 2005445501 is about 1261.0634972112.

The spelling of 2005445501 in words is "two billion, five million, four hundred forty-five thousand, five hundred one".