2232421 has 2 divisors, whose sum is σ = 2232422. Its totient is φ = 2232420.

The previous prime is 2232401. The next prime is 2232427. The reversal of 2232421 is 1242322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2220100 + 12321 = 1490^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2232421 - 2⁹ = 2231909 is a prime.

It is a super-3 number, since 3×2232421³ = 33377173195777063383, which contains 333 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2232395 and 2232404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2232427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1116210 + 1116211.

It is an arithmetic number, because the mean of its divisors is an integer number (1116211).

2^2232421 is an apocalyptic number.

It is an amenable number.

2232421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2232421 is an equidigital number, since it uses as much as digits as its factorization.

2232421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 16.

The square root of 2232421 is about 1494.1288431725. The cubic root of 2232421 is about 130.6949177369.

Adding to 2232421 its reverse (1242322), we get a palindrome (3474743).

Subtracting from 2232421 its reverse (1242322), we obtain a palindrome (990099).

The spelling of 2232421 in words is "two million, two hundred thirty-two thousand, four hundred twenty-one".