220405607 has 4 divisors (see below), whose sum is σ = 225095136. Its totient is φ = 215716080.

The previous prime is 220405583. The next prime is 220405621. The reversal of 220405607 is 706504022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220405607 - 2⁶ = 220405543 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 (220405637) 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, 2344694 + ... + 2344787.

It is an arithmetic number, because the mean of its divisors is an integer number (56273784).

Almost surely, 2^220405607 is an apocalyptic number.

220405607 is a deficient number, since it is larger than the sum of its proper divisors (4689529).

220405607 is an equidigital number, since it uses as much as digits as its factorization.

220405607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689528.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 220405607 is about 14846.0636870519. The cubic root of 220405607 is about 604.0518417778.

Adding to 220405607 its reverse (706504022), we get a palindrome (926909629).

The spelling of 220405607 in words is "two hundred twenty million, four hundred five thousand, six hundred seven".