2051443221 has 8 divisors (see below), whose sum is σ = 2736625824. Its totient is φ = 1366944720.

The previous prime is 2051443187. The next prime is 2051443223. The reversal of 2051443221 is 1223441502.

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

It is not a de Polignac number, because 2051443221 - 2¹¹ = 2051441173 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2051443191 and 2051443200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051443223) 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, 163986 + ... + 176051.

It is an arithmetic number, because the mean of its divisors is an integer number (342078228).

Almost surely, 2^2051443221 is an apocalyptic number.

It is an amenable number.

2051443221 is a deficient number, since it is larger than the sum of its proper divisors (685182603).

2051443221 is a wasteful number, since it uses less digits than its factorization.

2051443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342051.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2051443221 is about 45292.8605963456. The cubic root of 2051443221 is about 1270.6321322473.

Adding to 2051443221 its reverse (1223441502), we get a palindrome (3274884723).

The spelling of 2051443221 in words is "two billion, fifty-one million, four hundred forty-three thousand, two hundred twenty-one".