2220061601 has 4 divisors (see below), whose sum is σ = 2242948932. Its totient is φ = 2197174272.

The previous prime is 2220061567. The next prime is 2220061607. The reversal of 2220061601 is 1061600222.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 841870225 + 1378191376 = 29015^2 + 37124^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220061601 - 2¹⁸ = 2219799457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2220061607) 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, 11443520 + ... + 11443713.

It is an arithmetic number, because the mean of its divisors is an integer number (560737233).

Almost surely, 2^2220061601 is an apocalyptic number.

It is an amenable number.

2220061601 is a deficient number, since it is larger than the sum of its proper divisors (22887331).

2220061601 is an equidigital number, since it uses as much as digits as its factorization.

2220061601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22887330.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2220061601 is about 47117.5296572305. The cubic root of 2220061601 is about 1304.5328159423.

Adding to 2220061601 its reverse (1061600222), we get a palindrome (3281661823).

The spelling of 2220061601 in words is "two billion, two hundred twenty million, sixty-one thousand, six hundred one".