2085148721 has 8 divisors (see below), whose sum is σ = 2094160200. Its totient is φ = 2076152832.

The previous prime is 2085148717. The next prime is 2085148729. The reversal of 2085148721 is 1278415802.

It can be written as a sum of positive squares in 4 ways, for example, as 752898721 + 1332250000 = 27439^2 + 36500^2 .

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 2085148721 - 2² = 2085148717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2085148729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320105 + ... + 326553.

It is an arithmetic number, because the mean of its divisors is an integer number (261770025).

Almost surely, 2^2085148721 is an apocalyptic number.

It is an amenable number.

2085148721 is a deficient number, since it is larger than the sum of its proper divisors (9011479).

2085148721 is a wasteful number, since it uses less digits than its factorization.

2085148721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7795.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 2085148721 is about 45663.4287039421. The cubic root of 2085148721 is about 1277.5532526058.

The spelling of 2085148721 in words is "two billion, eighty-five million, one hundred forty-eight thousand, seven hundred twenty-one".