2152040405 has 8 divisors (see below), whose sum is σ = 2584059192. Its totient is φ = 1720558528.

The previous prime is 2152040321. The next prime is 2152040419. The reversal of 2152040405 is 5040402512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 460445764 + 1691594641 = 21458^2 + 41129^2 .

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 2152040405 - 2¹² = 2152036309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 125354 + ... + 141483.

It is an arithmetic number, because the mean of its divisors is an integer number (323007399).

Almost surely, 2^2152040405 is an apocalyptic number.

It is an amenable number.

2152040405 is a deficient number, since it is larger than the sum of its proper divisors (432018787).

2152040405 is a wasteful number, since it uses less digits than its factorization.

2152040405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268455.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 2152040405 is about 46390.0895127397. The cubic root of 2152040405 is about 1291.0710422796.

Adding to 2152040405 its reverse (5040402512), we get a palindrome (7192442917).

The spelling of 2152040405 in words is "two billion, one hundred fifty-two million, forty thousand, four hundred five".