2152013421 has 4 divisors (see below), whose sum is σ = 2869351232. Its totient is φ = 1434675612.

The previous prime is 2152013419. The next prime is 2152013441. The reversal of 2152013421 is 1243102512.

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 not a de Polignac number, because 2152013421 - 2¹ = 2152013419 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152013441) 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, 358668901 + ... + 358668906.

It is an arithmetic number, because the mean of its divisors is an integer number (717337808).

Almost surely, 2^2152013421 is an apocalyptic number.

It is an amenable number.

2152013421 is a deficient number, since it is larger than the sum of its proper divisors (717337811).

2152013421 is an equidigital number, since it uses as much as digits as its factorization.

2152013421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717337810.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2152013421 is about 46389.7986738464. The cubic root of 2152013421 is about 1291.0656460973.

Adding to 2152013421 its reverse (1243102512), we get a palindrome (3395115933).

The spelling of 2152013421 in words is "two billion, one hundred fifty-two million, thirteen thousand, four hundred twenty-one".