2185572505 has 4 divisors (see below), whose sum is σ = 2622687012. Its totient is φ = 1748458000.

The previous prime is 2185572503. The next prime is 2185572523. The reversal of 2185572505 is 5052755812.

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 900780169 + 1284792336 = 30013^2 + 35844^2 .

It is not a de Polignac number, because 2185572505 - 2¹ = 2185572503 is a prime.

It is a super-2 number, since 2×2185572505² = 9553454349223950050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2185572503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218557246 + ... + 218557255.

It is an arithmetic number, because the mean of its divisors is an integer number (655671753).

Almost surely, 2^2185572505 is an apocalyptic number.

It is an amenable number.

2185572505 is a deficient number, since it is larger than the sum of its proper divisors (437114507).

2185572505 is an equidigital number, since it uses as much as digits as its factorization.

2185572505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437114506.

The product of its (nonzero) digits is 140000, while the sum is 40.

The square root of 2185572505 is about 46750.1070052251. The cubic root of 2185572505 is about 1297.7421369869.

The spelling of 2185572505 in words is "two billion, one hundred eighty-five million, five hundred seventy-two thousand, five hundred five".