2100025505 has 8 divisors (see below), whose sum is σ = 2530847592. Its totient is φ = 1672809088.

The previous prime is 2100025489. The next prime is 2100025547. The reversal of 2100025505 is 5055200012.

It can be written as a sum of positive squares in 4 ways, for example, as 47210641 + 2052814864 = 6871^2 + 45308^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100025505 - 2⁴ = 2100025489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900134 + ... + 902463.

It is an arithmetic number, because the mean of its divisors is an integer number (316355949).

Almost surely, 2^2100025505 is an apocalyptic number.

It is an amenable number.

2100025505 is a deficient number, since it is larger than the sum of its proper divisors (430822087).

2100025505 is a wasteful number, since it uses less digits than its factorization.

2100025505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802835.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 2100025505 is about 45826.0352310780. The cubic root of 2100025505 is about 1280.5843492795.

Adding to 2100025505 its reverse (5055200012), we get a palindrome (7155225517).

The spelling of 2100025505 in words is "two billion, one hundred million, twenty-five thousand, five hundred five".