263279251 has 2 divisors, whose sum is σ = 263279252. Its totient is φ = 263279250.

The previous prime is 263279201. The next prime is 263279267. The reversal of 263279251 is 152972362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263279251 - 2⁷ = 263279123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263279251.

It is not a weakly prime, because it can be changed into another prime (263279201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131639625 + 131639626.

It is an arithmetic number, because the mean of its divisors is an integer number (131639626).

Almost surely, 2^263279251 is an apocalyptic number.

263279251 is a deficient number, since it is larger than the sum of its proper divisors (1).

263279251 is an equidigital number, since it uses as much as digits as its factorization.

263279251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 263279251 is about 16225.8821331846. The cubic root of 263279251 is about 640.9225391797.

The spelling of 263279251 in words is "two hundred sixty-three million, two hundred seventy-nine thousand, two hundred fifty-one".