2131056161 has 8 divisors (see below), whose sum is σ = 2295798120. Its totient is φ = 1966430592.

The previous prime is 2131056149. The next prime is 2131056173. The reversal of 2131056161 is 1616501312.

It is an interprime number because it is at equal distance from previous prime (2131056149) and next prime (2131056173).

It can be written as a sum of positive squares in 4 ways, for example, as 20205025 + 2110851136 = 4495^2 + 45944^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131056161 - 2¹⁰ = 2131055137 is a prime.

It is a super-2 number, since 2×2131056161² = 9082800722672115842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131056161.

It is not an unprimeable number, because it can be changed into a prime (2131056061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10991 + ... + 66203.

It is an arithmetic number, because the mean of its divisors is an integer number (286974765).

Almost surely, 2^2131056161 is an apocalyptic number.

It is an amenable number.

2131056161 is a deficient number, since it is larger than the sum of its proper divisors (164741959).

2131056161 is a wasteful number, since it uses less digits than its factorization.

2131056161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58195.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 2131056161 is about 46163.3638397377. The cubic root of 2131056161 is about 1286.8609777130.

Adding to 2131056161 its reverse (1616501312), we get a palindrome (3747557473).

The spelling of 2131056161 in words is "two billion, one hundred thirty-one million, fifty-six thousand, one hundred sixty-one".