232423021 has 4 divisors (see below), whose sum is σ = 235606972. Its totient is φ = 229239072.

The previous prime is 232423019. The next prime is 232423039. The reversal of 232423021 is 120324232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130210921 + 102212100 = 11411^2 + 10110^2 .

It is a cyclic number.

It is not a de Polignac number, because 232423021 - 2¹ = 232423019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 232423021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232423091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1591866 + ... + 1592011.

It is an arithmetic number, because the mean of its divisors is an integer number (58901743).

Almost surely, 2^232423021 is an apocalyptic number.

It is an amenable number.

232423021 is a deficient number, since it is larger than the sum of its proper divisors (3183951).

232423021 is an equidigital number, since it uses as much as digits as its factorization.

232423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3183950.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 232423021 is about 15245.4262321524. The cubic root of 232423021 is about 614.8366023267.

Adding to 232423021 its reverse (120324232), we get a palindrome (352747253).

The spelling of 232423021 in words is "two hundred thirty-two million, four hundred twenty-three thousand, twenty-one".