421233231 has 16 divisors (see below), whose sum is σ = 565804800. Its totient is φ = 278750208.

The previous prime is 421233193. The next prime is 421233269. The reversal of 421233231 is 132332124.

It is an interprime number because it is at equal distance from previous prime (421233193) and next prime (421233269).

It is not a de Polignac number, because 421233231 - 2⁷ = 421233103 is a prime.

It is a super-2 number, since 2×421233231² = 354874869797398722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421233198 and 421233207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421231231) 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, 298255 + ... + 299663.

It is an arithmetic number, because the mean of its divisors is an integer number (35362800).

Almost surely, 2^421233231 is an apocalyptic number.

421233231 is a deficient number, since it is larger than the sum of its proper divisors (144571569).

421233231 is a wasteful number, since it uses less digits than its factorization.

421233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078.

The product of its digits is 864, while the sum is 21.

The square root of 421233231 is about 20523.9672334566. The cubic root of 421233231 is about 749.6194994362.

Adding to 421233231 its reverse (132332124), we get a palindrome (553565355).

It can be divided in two parts, 42123 and 3231, that added together give a palindrome (45354).

The spelling of 421233231 in words is "four hundred twenty-one million, two hundred thirty-three thousand, two hundred thirty-one".