2152040421 has 8 divisors (see below), whose sum is σ = 3038174784. Its totient is φ = 1350299840.

The previous prime is 2152040419. The next prime is 2152040477. The reversal of 2152040421 is 1240402512.

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 2152040421 - 2¹ = 2152040419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152040321) 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 7 ways as a sum of consecutive naturals, for example, 21098385 + ... + 21098486.

It is an arithmetic number, because the mean of its divisors is an integer number (379771848).

Almost surely, 2^2152040421 is an apocalyptic number.

It is an amenable number.

2152040421 is a deficient number, since it is larger than the sum of its proper divisors (886134363).

2152040421 is a wasteful number, since it uses less digits than its factorization.

2152040421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42196891.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2152040421 is about 46390.0896851903. The cubic root of 2152040421 is about 1291.0710454792.

Adding to 2152040421 its reverse (1240402512), we get a palindrome (3392442933).

The spelling of 2152040421 in words is "two billion, one hundred fifty-two million, forty thousand, four hundred twenty-one".