2051453221 has 4 divisors (see below), whose sum is σ = 2052216000. Its totient is φ = 2050690444.

The previous prime is 2051453171. The next prime is 2051453231. The reversal of 2051453221 is 1223541502.

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 2051453221 - 2⁷ = 2051453093 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 (2051453231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377341 + ... + 382738.

It is an arithmetic number, because the mean of its divisors is an integer number (513054000).

Almost surely, 2^2051453221 is an apocalyptic number.

It is an amenable number.

2051453221 is a deficient number, since it is larger than the sum of its proper divisors (762779).

2051453221 is an equidigital number, since it uses as much as digits as its factorization.

2051453221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762778.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2051453221 is about 45292.9709888852. The cubic root of 2051453221 is about 1270.6341968589.

Adding to 2051453221 its reverse (1223541502), we get a palindrome (3274994723).

The spelling of 2051453221 in words is "two billion, fifty-one million, four hundred fifty-three thousand, two hundred twenty-one".