2117017155 has 32 divisors (see below), whose sum is σ = 3745797120. Its totient is φ = 1012366080.

The previous prime is 2117017141. The next prime is 2117017163. The reversal of 2117017155 is 5517107112.

It is not a de Polignac number, because 2117017155 - 2⁷ = 2117017027 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75835 + ... + 99924.

It is an arithmetic number, because the mean of its divisors is an integer number (117056160).

Almost surely, 2^2117017155 is an apocalyptic number.

2117017155 is a deficient number, since it is larger than the sum of its proper divisors (1628779965).

2117017155 is a wasteful number, since it uses less digits than its factorization.

2117017155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175851.

The product of its (nonzero) digits is 2450, while the sum is 30.

The square root of 2117017155 is about 46011.0547042773. The cubic root of 2117017155 is about 1284.0288816642.

The spelling of 2117017155 in words is "two billion, one hundred seventeen million, seventeen thousand, one hundred fifty-five".