233721345 has 32 divisors (see below), whose sum is σ = 439334784. Its totient is φ = 104601600.

The previous prime is 233721329. The next prime is 233721359. The reversal of 233721345 is 543127332.

233721345 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 233721345 - 2⁴ = 233721329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52336 + ... + 56625.

It is an arithmetic number, because the mean of its divisors is an integer number (13729212).

Almost surely, 2^233721345 is an apocalyptic number.

It is an amenable number.

233721345 is a deficient number, since it is larger than the sum of its proper divisors (205613439).

233721345 is a wasteful number, since it uses less digits than its factorization.

233721345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108993.

The product of its digits is 15120, while the sum is 30.

The square root of 233721345 is about 15287.9477039922. The cubic root of 233721345 is about 615.9793109161.

Adding to 233721345 its reverse (543127332), we get a palindrome (776848677).

The spelling of 233721345 in words is "two hundred thirty-three million, seven hundred twenty-one thousand, three hundred forty-five".