2146406221 has 8 divisors (see below), whose sum is σ = 2176282880. Its totient is φ = 2116597392.

The previous prime is 2146406219. The next prime is 2146406257. The reversal of 2146406221 is 1226046412.

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 2146406221 - 2¹ = 2146406219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2146406221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146406201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48511 + ... + 81523.

It is an arithmetic number, because the mean of its divisors is an integer number (272035360).

Almost surely, 2^2146406221 is an apocalyptic number.

It is an amenable number.

2146406221 is a deficient number, since it is larger than the sum of its proper divisors (29876659).

2146406221 is an equidigital number, since it uses as much as digits as its factorization.

2146406221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33915.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2146406221 is about 46329.3235543106. The cubic root of 2146406221 is about 1289.9433544824.

The spelling of 2146406221 in words is "two billion, one hundred forty-six million, four hundred six thousand, two hundred twenty-one".