263211944878031 has 2 divisors, whose sum is σ = 263211944878032. Its totient is φ = 263211944878030.

The previous prime is 263211944877997. The next prime is 263211944878199. The reversal of 263211944878031 is 130878449112362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263211944878031 - 2³⁰ = 263210871136207 is a prime.

It is a super-2 number, since 2×263211944878031² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263211944878931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131605972439015 + 131605972439016.

It is an arithmetic number, because the mean of its divisors is an integer number (131605972439016).

Almost surely, 2^{263211944878031} is an apocalyptic number.

263211944878031 is a deficient number, since it is larger than the sum of its proper divisors (1).

263211944878031 is an equidigital number, since it uses as much as digits as its factorization.

263211944878031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 263211944878031 in words is "two hundred sixty-three trillion, two hundred eleven billion, nine hundred forty-four million, eight hundred seventy-eight thousand, thirty-one".