223132421 has 2 divisors, whose sum is σ = 223132422. Its totient is φ = 223132420.

The previous prime is 223132397. The next prime is 223132433. The reversal of 223132421 is 124231322.

223132421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216501796 + 6630625 = 14714^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 223132421 - 2¹⁴ = 223116037 is a prime.

It is a super-3 number, since 3×223132421³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 223132393 and 223132402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223132471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111566210 + 111566211.

It is an arithmetic number, because the mean of its divisors is an integer number (111566211).

Almost surely, 2^223132421 is an apocalyptic number.

It is an amenable number.

223132421 is a deficient number, since it is larger than the sum of its proper divisors (1).

223132421 is an equidigital number, since it uses as much as digits as its factorization.

223132421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 223132421 is about 14937.6176480723. The cubic root of 223132421 is about 606.5327082496.

Adding to 223132421 its reverse (124231322), we get a palindrome (347363743).

The spelling of 223132421 in words is "two hundred twenty-three million, one hundred thirty-two thousand, four hundred twenty-one".