2261505005 has 4 divisors (see below), whose sum is σ = 2713806012. Its totient is φ = 1809204000.

The previous prime is 2261504989. The next prime is 2261505011. The reversal of 2261505005 is 5005051622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 668377609 + 1593127396 = 25853^2 + 39914^2 .

It is not a de Polignac number, because 2261505005 - 2⁴ = 2261504989 is a prime.

It is a super-2 number, since 2×2261505005² = 10228809775280100050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 226150496 + ... + 226150505.

It is an arithmetic number, because the mean of its divisors is an integer number (678451503).

Almost surely, 2^2261505005 is an apocalyptic number.

It is an amenable number.

2261505005 is a deficient number, since it is larger than the sum of its proper divisors (452301007).

2261505005 is an equidigital number, since it uses as much as digits as its factorization.

2261505005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452301006.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2261505005 is about 47555.2836706922. The cubic root of 2261505005 is about 1312.6003561057.

Adding to 2261505005 its reverse (5005051622), we get a palindrome (7266556627).

The spelling of 2261505005 in words is "two billion, two hundred sixty-one million, five hundred five thousand, five".