233445421 has 8 divisors (see below), whose sum is σ = 256773888. Its totient is φ = 212221900.

The previous prime is 233445413. The next prime is 233445437. The reversal of 233445421 is 124544332.

It is a happy number.

233445421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 233445421 - 2³ = 233445413 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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 233445421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233445451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86365 + ... + 89026.

It is an arithmetic number, because the mean of its divisors is an integer number (32096736).

Almost surely, 2^233445421 is an apocalyptic number.

It is an amenable number.

233445421 is a deficient number, since it is larger than the sum of its proper divisors (23328467).

233445421 is an equidigital number, since it uses as much as digits as its factorization.

233445421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175424 (or 175402 counting only the distinct ones).

The product of its digits is 11520, while the sum is 28.

The square root of 233445421 is about 15278.9208061303. The cubic root of 233445421 is about 615.7368135899.

Adding to 233445421 its reverse (124544332), we get a palindrome (357989753).

The spelling of 233445421 in words is "two hundred thirty-three million, four hundred forty-five thousand, four hundred twenty-one".