5211661161 has 16 divisors (see below), whose sum is σ = 7955702784. Its totient is φ = 2972795664.

The previous prime is 5211661153. The next prime is 5211661237. The reversal of 5211661161 is 1611661125.

It is not a de Polignac number, because 5211661161 - 2³ = 5211661153 is a prime.

It is a super-2 number, since 2×5211661161² = 54322824114151735842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5211661111) 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 15 ways as a sum of consecutive naturals, for example, 208581 + ... + 232226.

It is an arithmetic number, because the mean of its divisors is an integer number (497231424).

Almost surely, 2^5211661161 is an apocalyptic number.

It is an amenable number.

5211661161 is a deficient number, since it is larger than the sum of its proper divisors (2744041623).

5211661161 is a wasteful number, since it uses less digits than its factorization.

5211661161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441380.

The product of its digits is 2160, while the sum is 30.

The square root of 5211661161 is about 72191.8358334237. The cubic root of 5211661161 is about 1733.7722891689.

The spelling of 5211661161 in words is "five billion, two hundred eleven million, six hundred sixty-one thousand, one hundred sixty-one".