2220256673 has 4 divisors (see below), whose sum is σ = 2291877888. Its totient is φ = 2148635460.

The previous prime is 2220256651. The next prime is 2220256739. The reversal of 2220256673 is 3766520222.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3766520222 = 2 ⋅1883260111.

It is a cyclic number.

It is not a de Polignac number, because 2220256673 - 2¹⁸ = 2219994529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220256613) 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, 35810561 + ... + 35810622.

It is an arithmetic number, because the mean of its divisors is an integer number (572969472).

Almost surely, 2^2220256673 is an apocalyptic number.

It is an amenable number.

2220256673 is a deficient number, since it is larger than the sum of its proper divisors (71621215).

2220256673 is an equidigital number, since it uses as much as digits as its factorization.

2220256673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71621214.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 2220256673 is about 47119.5996693520. The cubic root of 2220256673 is about 1304.5710236467.

Adding to 2220256673 its reverse (3766520222), we get a palindrome (5986776895).

The spelling of 2220256673 in words is "two billion, two hundred twenty million, two hundred fifty-six thousand, six hundred seventy-three".