2423043221 has 4 divisors (see below), whose sum is σ = 2423246112. Its totient is φ = 2422840332.

The previous prime is 2423043209. The next prime is 2423043251. The reversal of 2423043221 is 1223403242.

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 2423043221 - 2¹⁸ = 2422781077 is a prime.

It is a super-2 number, since 2×2423043221² = 11742276901668109682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2423043251) 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, 82331 + ... + 107816.

It is an arithmetic number, because the mean of its divisors is an integer number (605811528).

Almost surely, 2^2423043221 is an apocalyptic number.

It is an amenable number.

2423043221 is a deficient number, since it is larger than the sum of its proper divisors (202891).

2423043221 is a wasteful number, since it uses less digits than its factorization.

2423043221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202890.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2423043221 is about 49224.4169188422. The cubic root of 2423043221 is about 1343.1372288666.

Adding to 2423043221 its reverse (1223403242), we get a palindrome (3646446463).

The spelling of 2423043221 in words is "two billion, four hundred twenty-three million, forty-three thousand, two hundred twenty-one".