2148251805 has 24 divisors (see below), whose sum is σ = 4255585152. Its totient is φ = 982057824.

The previous prime is 2148251789. The next prime is 2148251813. The reversal of 2148251805 is 5081528412.

It is not a de Polignac number, because 2148251805 - 2⁴ = 2148251789 is a prime.

It is a super-2 number, since 2×2148251805² = 9229971635371516050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2148251805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3409609 + ... + 3410238.

It is an arithmetic number, because the mean of its divisors is an integer number (177316048).

Almost surely, 2^2148251805 is an apocalyptic number.

It is an amenable number.

2148251805 is a deficient number, since it is larger than the sum of its proper divisors (2107333347).

2148251805 is a wasteful number, since it uses less digits than its factorization.

2148251805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819865 (or 6819862 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 2148251805 is about 46349.2373723668. The cubic root of 2148251805 is about 1290.3129671512.

The spelling of 2148251805 in words is "two billion, one hundred forty-eight million, two hundred fifty-one thousand, eight hundred five".