261056183 has 2 divisors, whose sum is σ = 261056184. Its totient is φ = 261056182.

The previous prime is 261056171. The next prime is 261056207. The reversal of 261056183 is 381650162.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261056183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261056123) 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 as a sum of consecutive naturals, namely, 130528091 + 130528092.

It is an arithmetic number, because the mean of its divisors is an integer number (130528092).

Almost surely, 2^261056183 is an apocalyptic number.

261056183 is a deficient number, since it is larger than the sum of its proper divisors (1).

261056183 is an equidigital number, since it uses as much as digits as its factorization.

261056183 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 261056183 is about 16157.2331480362. The cubic root of 261056183 is about 639.1135048986.

The spelling of 261056183 in words is "two hundred sixty-one million, fifty-six thousand, one hundred eighty-three".