263881157 has 4 divisors (see below), whose sum is σ = 279403596. Its totient is φ = 248358720.

The previous prime is 263881129. The next prime is 263881169. The reversal of 263881157 is 751188362.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170198116 + 93683041 = 13046^2 + 9679^2 .

It is a cyclic number.

It is not a de Polignac number, because 263881157 - 2²⁶ = 196772293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263881127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7761194 + ... + 7761227.

It is an arithmetic number, because the mean of its divisors is an integer number (69850899).

Almost surely, 2^263881157 is an apocalyptic number.

It is an amenable number.

263881157 is a deficient number, since it is larger than the sum of its proper divisors (15522439).

263881157 is a wasteful number, since it uses less digits than its factorization.

263881157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15522438.

The product of its digits is 80640, while the sum is 41.

The square root of 263881157 is about 16244.4192570864. The cubic root of 263881157 is about 641.4105906920.

The spelling of 263881157 in words is "two hundred sixty-three million, eight hundred eighty-one thousand, one hundred fifty-seven".