2152305421 has 4 divisors (see below), whose sum is σ = 2459777632. Its totient is φ = 1844833212.

The previous prime is 2152305413. The next prime is 2152305437. The reversal of 2152305421 is 1245032512.

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 2152305421 - 2³ = 2152305413 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 (2152305401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153736095 + ... + 153736108.

It is an arithmetic number, because the mean of its divisors is an integer number (614944408).

Almost surely, 2^2152305421 is an apocalyptic number.

It is an amenable number.

2152305421 is a deficient number, since it is larger than the sum of its proper divisors (307472211).

2152305421 is an equidigital number, since it uses as much as digits as its factorization.

2152305421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307472210.

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

The square root of 2152305421 is about 46392.9458107588. The cubic root of 2152305421 is about 1291.1240370155.

Adding to 2152305421 its reverse (1245032512), we get a palindrome (3397337933).

The spelling of 2152305421 in words is "two billion, one hundred fifty-two million, three hundred five thousand, four hundred twenty-one".