232404021 has 6 divisors (see below), whose sum is σ = 335694710. Its totient is φ = 154936008.

The previous prime is 232404019. The next prime is 232404061. The reversal of 232404021 is 120404232.

232404021 is a `hidden beast` number, since 23 + 240 + 402 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 146748996 + 85655025 = 12114^2 + 9255^2 .

It is not a de Polignac number, because 232404021 - 2¹ = 232404019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 232403985 and 232404003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232404001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12911326 + ... + 12911343.

Almost surely, 2^232404021 is an apocalyptic number.

It is an amenable number.

232404021 is a deficient number, since it is larger than the sum of its proper divisors (103290689).

232404021 is a wasteful number, since it uses less digits than its factorization.

232404021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25822675 (or 25822672 counting only the distinct ones).

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

The square root of 232404021 is about 15244.8030817062. The cubic root of 232404021 is about 614.8198480859.

Adding to 232404021 its reverse (120404232), we get a palindrome (352808253).

It can be divided in two parts, 23240 and 4021, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 232404021 in words is "two hundred thirty-two million, four hundred four thousand, twenty-one".