220764417 has 4 divisors (see below), whose sum is σ = 294352560. Its totient is φ = 147176276.

The previous prime is 220764409. The next prime is 220764463. The reversal of 220764417 is 714467022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220764417 - 2³ = 220764409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220764407) 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, 36794067 + ... + 36794072.

It is an arithmetic number, because the mean of its divisors is an integer number (73588140).

Almost surely, 2^220764417 is an apocalyptic number.

It is an amenable number.

220764417 is a deficient number, since it is larger than the sum of its proper divisors (73588143).

220764417 is an equidigital number, since it uses as much as digits as its factorization.

220764417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73588142.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 220764417 is about 14858.1431208614. The cubic root of 220764417 is about 604.3794534274.

The spelling of 220764417 in words is "two hundred twenty million, seven hundred sixty-four thousand, four hundred seventeen".