2151801841 has 4 divisors (see below), whose sum is σ = 2459202112. Its totient is φ = 1844401572.

The previous prime is 2151801739. The next prime is 2151801881. The reversal of 2151801841 is 1481081512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2151801841 - 2⁷ = 2151801713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151801881) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 153700125 + ... + 153700138.

It is an arithmetic number, because the mean of its divisors is an integer number (614800528).

Almost surely, 2^2151801841 is an apocalyptic number.

It is an amenable number.

2151801841 is a deficient number, since it is larger than the sum of its proper divisors (307400271).

2151801841 is an equidigital number, since it uses as much as digits as its factorization.

2151801841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307400270.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 2151801841 is about 46387.5181595222. The cubic root of 2151801841 is about 1291.0233333776.

The spelling of 2151801841 in words is "two billion, one hundred fifty-one million, eight hundred one thousand, eight hundred forty-one".