220440345 has 16 divisors (see below), whose sum is σ = 353471040. Its totient is φ = 117312704.

The previous prime is 220440331. The next prime is 220440347. The reversal of 220440345 is 543044022.

220440345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 220440345 - 2⁴ = 220440329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220440347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8730 + ... + 22739.

It is an arithmetic number, because the mean of its divisors is an integer number (22091940).

Almost surely, 2^220440345 is an apocalyptic number.

It is an amenable number.

220440345 is a deficient number, since it is larger than the sum of its proper divisors (133030695).

220440345 is a wasteful number, since it uses less digits than its factorization.

220440345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31944.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 220440345 is about 14847.2335807045. The cubic root of 220440345 is about 604.0835748643.

Adding to 220440345 its reverse (543044022), we get a palindrome (763484367).

The spelling of 220440345 in words is "two hundred twenty million, four hundred forty thousand, three hundred forty-five".