2164333421 has 4 divisors (see below), whose sum is σ = 2164668000. Its totient is φ = 2163998844.

The previous prime is 2164333411. The next prime is 2164333433. The reversal of 2164333421 is 1243334612.

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 2164333421 - 2⁶ = 2164333357 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 (2164333411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157391 + ... + 170588.

It is an arithmetic number, because the mean of its divisors is an integer number (541167000).

Almost surely, 2^2164333421 is an apocalyptic number.

It is an amenable number.

2164333421 is a deficient number, since it is larger than the sum of its proper divisors (334579).

2164333421 is an equidigital number, since it uses as much as digits as its factorization.

2164333421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334578.

The product of its digits is 10368, while the sum is 29.

The square root of 2164333421 is about 46522.3969825287. The cubic root of 2164333421 is about 1293.5246877315.

The spelling of 2164333421 in words is "two billion, one hundred sixty-four million, three hundred thirty-three thousand, four hundred twenty-one".