263616251 has 2 divisors, whose sum is σ = 263616252. Its totient is φ = 263616250.

The previous prime is 263616239. The next prime is 263616289. The reversal of 263616251 is 152616362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263616251 - 2¹⁴ = 263599867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (263616751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131808125 + 131808126.

It is an arithmetic number, because the mean of its divisors is an integer number (131808126).

Almost surely, 2^263616251 is an apocalyptic number.

263616251 is a deficient number, since it is larger than the sum of its proper divisors (1).

263616251 is an equidigital number, since it uses as much as digits as its factorization.

263616251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 263616251 is about 16236.2634556107. The cubic root of 263616251 is about 641.1958849442.

The spelling of 263616251 in words is "two hundred sixty-three million, six hundred sixteen thousand, two hundred fifty-one".