2148306861 has 8 divisors (see below), whose sum is σ = 2866964320. Its totient is φ = 1430926992.

The previous prime is 2148306817. The next prime is 2148306869. The reversal of 2148306861 is 1686038412.

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

It is not a de Polignac number, because 2148306861 - 2⁷ = 2148306733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2148306869) 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 7 ways as a sum of consecutive naturals, for example, 315466 + ... + 322203.

It is an arithmetic number, because the mean of its divisors is an integer number (358370540).

Almost surely, 2^2148306861 is an apocalyptic number.

It is an amenable number.

2148306861 is a deficient number, since it is larger than the sum of its proper divisors (718657459).

2148306861 is a wasteful number, since it uses less digits than its factorization.

2148306861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638795.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 2148306861 is about 46349.8312941914. The cubic root of 2148306861 is about 1290.3239898913.

The spelling of 2148306861 in words is "two billion, one hundred forty-eight million, three hundred six thousand, eight hundred sixty-one".