261223063 has 2 divisors, whose sum is σ = 261223064. Its totient is φ = 261223062.

The previous prime is 261223051. The next prime is 261223069. The reversal of 261223063 is 360322162.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261223063 - 2²⁵ = 227668631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261223069) 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 as a sum of consecutive naturals, namely, 130611531 + 130611532.

It is an arithmetic number, because the mean of its divisors is an integer number (130611532).

Almost surely, 2^261223063 is an apocalyptic number.

261223063 is a deficient number, since it is larger than the sum of its proper divisors (1).

261223063 is an equidigital number, since it uses as much as digits as its factorization.

261223063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 261223063 is about 16162.3965735283. The cubic root of 261223063 is about 639.2496601917.

Subtracting 261223063 from its reverse (360322162), we obtain a palindrome (99099099).

The spelling of 261223063 in words is "two hundred sixty-one million, two hundred twenty-three thousand, sixty-three".