2152057021 has 4 divisors (see below), whose sum is σ = 2265323200. Its totient is φ = 2038790844.

The previous prime is 2152056967. The next prime is 2152057049. The reversal of 2152057021 is 1207502512.

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 2152057021 - 2²³ = 2143668413 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 (2152057121) 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 3 ways as a sum of consecutive naturals, for example, 56633061 + ... + 56633098.

It is an arithmetic number, because the mean of its divisors is an integer number (566330800).

Almost surely, 2^2152057021 is an apocalyptic number.

It is an amenable number.

2152057021 is a deficient number, since it is larger than the sum of its proper divisors (113266179).

2152057021 is a wasteful number, since it uses less digits than its factorization.

2152057021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113266178.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 2152057021 is about 46390.2686023696. The cubic root of 2152057021 is about 1291.0743650767.

Adding to 2152057021 its reverse (1207502512), we get a palindrome (3359559533).

The spelling of 2152057021 in words is "two billion, one hundred fifty-two million, fifty-seven thousand, twenty-one".