232220421 has 12 divisors (see below), whose sum is σ = 339676480. Its totient is φ = 152853480.

The previous prime is 232220419. The next prime is 232220423. The reversal of 232220421 is 124022232.

232220421 is a `hidden beast` number, since 23 + 2 + 220 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (232220419) and next prime (232220423).

It is not a de Polignac number, because 232220421 - 2¹ = 232220419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 232220394 and 232220403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232220423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162595 + ... + 164016.

Almost surely, 2^232220421 is an apocalyptic number.

It is an amenable number.

232220421 is a deficient number, since it is larger than the sum of its proper divisors (107456059).

232220421 is a wasteful number, since it uses less digits than its factorization.

232220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326696 (or 326693 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 232220421 is about 15238.7801677168. The cubic root of 232220421 is about 614.6579021464.

Adding to 232220421 its reverse (124022232), we get a palindrome (356242653).

The spelling of 232220421 in words is "two hundred thirty-two million, two hundred twenty thousand, four hundred twenty-one".