263318055 has 192 divisors, whose sum is σ = 607150080. Its totient is φ = 94348800.

The previous prime is 263318051. The next prime is 263318063. The reversal of 263318055 is 550813362.

It is not a de Polignac number, because 263318055 - 2² = 263318051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263318051) 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 in 191 ways as a sum of consecutive naturals, for example, 3708670 + ... + 3708740.

It is an arithmetic number, because the mean of its divisors is an integer number (3162240).

Almost surely, 2^263318055 is an apocalyptic number.

263318055 is an abundant number, since it is smaller than the sum of its proper divisors (343832025).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263318055 is a wasteful number, since it uses less digits than its factorization.

263318055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 263318055 is about 16227.0778330542. The cubic root of 263318055 is about 640.9540255658.

The spelling of 263318055 in words is "two hundred sixty-three million, three hundred eighteen thousand, fifty-five".