2111550161 has 32 divisors (see below), whose sum is σ = 2716047360. Its totient is φ = 1597936896.

The previous prime is 2111550149. The next prime is 2111550169. The reversal of 2111550161 is 1610551112.

It is not a de Polignac number, because 2111550161 - 2¹⁰ = 2111549137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111550169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228350 + ... + 237416.

It is an arithmetic number, because the mean of its divisors is an integer number (84876480).

Almost surely, 2^2111550161 is an apocalyptic number.

It is an amenable number.

2111550161 is a deficient number, since it is larger than the sum of its proper divisors (604497199).

2111550161 is a wasteful number, since it uses less digits than its factorization.

2111550161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9213.

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 2111550161 is about 45951.6067292538. The cubic root of 2111550161 is about 1282.9226349978.

The spelling of 2111550161 in words is "two billion, one hundred eleven million, five hundred fifty thousand, one hundred sixty-one".