2135444821 has 8 divisors (see below), whose sum is σ = 2233376640. Its totient is φ = 2037936912.

The previous prime is 2135444803. The next prime is 2135444849. The reversal of 2135444821 is 1284445312.

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 2135444821 - 2⁷ = 2135444693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135444881) by changing a digit.

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, 95650 + ... + 115843.

It is an arithmetic number, because the mean of its divisors is an integer number (279172080).

Almost surely, 2^2135444821 is an apocalyptic number.

It is an amenable number.

2135444821 is a deficient number, since it is larger than the sum of its proper divisors (97931819).

2135444821 is a wasteful number, since it uses less digits than its factorization.

2135444821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211955.

The product of its digits is 30720, while the sum is 34.

The square root of 2135444821 is about 46210.8734065912. The cubic root of 2135444821 is about 1287.7437517068.

The spelling of 2135444821 in words is "two billion, one hundred thirty-five million, four hundred forty-four thousand, eight hundred twenty-one".