2161017355 has 12 divisors (see below), whose sum is σ = 3016604160. Its totient is φ = 1481840304.

The previous prime is 2161017343. The next prime is 2161017359. The reversal of 2161017355 is 5537101612.

It is not a de Polignac number, because 2161017355 - 2⁹ = 2161016843 is a prime.

It is a super-2 number, since 2×2161017355² = 9339992017222392050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2161017359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4409995 + ... + 4410484.

It is an arithmetic number, because the mean of its divisors is an integer number (251383680).

Almost surely, 2^2161017355 is an apocalyptic number.

2161017355 is a deficient number, since it is larger than the sum of its proper divisors (855586805).

2161017355 is an equidigital number, since it uses as much as digits as its factorization.

2161017355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820498 (or 8820491 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 2161017355 is about 46486.7438631703. The cubic root of 2161017355 is about 1292.8637289154.

Adding to 2161017355 its reverse (5537101612), we get a palindrome (7698118967).

The spelling of 2161017355 in words is "two billion, one hundred sixty-one million, seventeen thousand, three hundred fifty-five".