234445021 has 4 divisors (see below), whose sum is σ = 238288444. Its totient is φ = 230601600.

The previous prime is 234445007. The next prime is 234445027. The reversal of 234445021 is 120544432.

It is a happy number.

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 3556996 + 230888025 = 1886^2 + 15195^2 .

It is a cyclic number.

It is not a de Polignac number, because 234445021 - 2⁵ = 234444989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234445027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1921620 + ... + 1921741.

It is an arithmetic number, because the mean of its divisors is an integer number (59572111).

Almost surely, 2^234445021 is an apocalyptic number.

It is an amenable number.

234445021 is a deficient number, since it is larger than the sum of its proper divisors (3843423).

234445021 is an equidigital number, since it uses as much as digits as its factorization.

234445021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3843422.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 234445021 is about 15311.5975978994. The cubic root of 234445021 is about 616.6144121618.

Adding to 234445021 its reverse (120544432), we get a palindrome (354989453).

The spelling of 234445021 in words is "two hundred thirty-four million, four hundred forty-five thousand, twenty-one".