2156265841 has 2 divisors, whose sum is σ = 2156265842. Its totient is φ = 2156265840.

The previous prime is 2156265827. The next prime is 2156265869. The reversal of 2156265841 is 1485626512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1849000000 + 307265841 = 43000^2 + 17529^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156265841 - 2¹¹ = 2156263793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2156265794 and 2156265803.

It is not a weakly prime, because it can be changed into another prime (2156265541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078132920 + 1078132921.

It is an arithmetic number, because the mean of its divisors is an integer number (1078132921).

Almost surely, 2^2156265841 is an apocalyptic number.

It is an amenable number.

2156265841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156265841 is an equidigital number, since it uses as much as digits as its factorization.

2156265841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 40.

The square root of 2156265841 is about 46435.6096223577. The cubic root of 2156265841 is about 1291.9154767829.

The spelling of 2156265841 in words is "two billion, one hundred fifty-six million, two hundred sixty-five thousand, eight hundred forty-one".