263151243 has 12 divisors (see below), whose sum is σ = 389378808. Its totient is φ = 171155040.

The previous prime is 263151241. The next prime is 263151253. The reversal of 263151243 is 342151362.

263151243 is a `hidden beast` number, since 2 + 631 + 5 + 1 + 24 + 3 = 666.

It is not a de Polignac number, because 263151243 - 2¹ = 263151241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263151241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356205 + ... + 356942.

It is an arithmetic number, because the mean of its divisors is an integer number (32448234).

Almost surely, 2^263151243 is an apocalyptic number.

263151243 is a deficient number, since it is larger than the sum of its proper divisors (126227565).

263151243 is a wasteful number, since it uses less digits than its factorization.

263151243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713194 (or 713191 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 263151243 is about 16221.9370914820. The cubic root of 263151243 is about 640.8186488398.

The spelling of 263151243 in words is "two hundred sixty-three million, one hundred fifty-one thousand, two hundred forty-three".