2221616061 has 24 divisors (see below), whose sum is σ = 3678544064. Its totient is φ = 1265647680.

The previous prime is 2221616051. The next prime is 2221616063. The reversal of 2221616061 is 1606161222.

2221616061 is a `hidden beast` number, since 22 + 21 + 616 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 2221616061 - 2⁷ = 2221615933 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 (2221616063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32416 + ... + 74121.

Almost surely, 2^2221616061 is an apocalyptic number.

2221616061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2221616061 is a deficient number, since it is larger than the sum of its proper divisors (1456928003).

2221616061 is a wasteful number, since it uses less digits than its factorization.

2221616061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106881 (or 106878 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2221616061 is about 47134.0223299476. The cubic root of 2221616061 is about 1304.8372175519.

Adding to 2221616061 its reverse (1606161222), we get a palindrome (3827777283).

The spelling of 2221616061 in words is "two billion, two hundred twenty-one million, six hundred sixteen thousand, sixty-one".