2152223421 has 16 divisors (see below), whose sum is σ = 2909776320. Its totient is φ = 1414869120.

The previous prime is 2152223383. The next prime is 2152223471. The reversal of 2152223421 is 1243222512.

It is not a de Polignac number, because 2152223421 - 2⁶ = 2152223357 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2152223391 and 2152223400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152223471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53401 + ... + 84593.

It is an arithmetic number, because the mean of its divisors is an integer number (181861020).

Almost surely, 2^2152223421 is an apocalyptic number.

It is an amenable number.

2152223421 is a deficient number, since it is larger than the sum of its proper divisors (757552899).

2152223421 is a wasteful number, since it uses less digits than its factorization.

2152223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31516.

The product of its digits is 1920, while the sum is 24.

The square root of 2152223421 is about 46392.0620472943. The cubic root of 2152223421 is about 1291.1076400992.

Adding to 2152223421 its reverse (1243222512), we get a palindrome (3395445933).

Subtracting from 2152223421 its reverse (1243222512), we obtain a palindrome (909000909).

The spelling of 2152223421 in words is "two billion, one hundred fifty-two million, two hundred twenty-three thousand, four hundred twenty-one".