261213273241 has 8 divisors (see below), whose sum is σ = 264814826760. Its totient is φ = 257612349312.

The previous prime is 261213273179. The next prime is 261213273259. The reversal of 261213273241 is 142372312162.

261213273241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14200297225 + 247012976016 = 119165^2 + 497004^2 .

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 261213273241 - 2²⁵ = 261179718809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261213273197 and 261213273206.

It is not an unprimeable number, because it can be changed into a prime (261913273241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710895 + ... + 1013803.

It is an arithmetic number, because the mean of its divisors is an integer number (33101853345).

Almost surely, 2^261213273241 is an apocalyptic number.

It is an amenable number.

261213273241 is a deficient number, since it is larger than the sum of its proper divisors (3601553519).

261213273241 is a wasteful number, since it uses less digits than its factorization.

261213273241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314795.

The product of its digits is 24192, while the sum is 34.

The spelling of 261213273241 in words is "two hundred sixty-one billion, two hundred thirteen million, two hundred seventy-three thousand, two hundred forty-one".