232453021 has 4 divisors (see below), whose sum is σ = 232598044. Its totient is φ = 232308000.

The previous prime is 232452991. The next prime is 232453027. The reversal of 232453021 is 120354232.

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 202037796 + 30415225 = 14214^2 + 5515^2 .

It is a cyclic number.

It is not a de Polignac number, because 232453021 - 2²¹ = 230355869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 232452983 and 232453001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232453027) 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, 70080 + ... + 73321.

It is an arithmetic number, because the mean of its divisors is an integer number (58149511).

Almost surely, 2^232453021 is an apocalyptic number.

It is an amenable number.

232453021 is a deficient number, since it is larger than the sum of its proper divisors (145023).

232453021 is a wasteful number, since it uses less digits than its factorization.

232453021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145022.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 232453021 is about 15246.4101020535. The cubic root of 232453021 is about 614.8630545322.

The spelling of 232453021 in words is "two hundred thirty-two million, four hundred fifty-three thousand, twenty-one".