220644965 has 8 divisors (see below), whose sum is σ = 265348608. Its totient is φ = 176132880.

The previous prime is 220644961. The next prime is 220644971. The reversal of 220644965 is 569446022.

220644965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220644965 - 2² = 220644961 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 (220644961) 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, 45341 + ... + 49970.

It is an arithmetic number, because the mean of its divisors is an integer number (33168576).

Almost surely, 2^220644965 is an apocalyptic number.

It is an amenable number.

220644965 is a deficient number, since it is larger than the sum of its proper divisors (44703643).

220644965 is an equidigital number, since it uses as much as digits as its factorization.

220644965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95779.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 220644965 is about 14854.1228283598. The cubic root of 220644965 is about 604.2704271625.

The spelling of 220644965 in words is "two hundred twenty million, six hundred forty-four thousand, nine hundred sixty-five".