263113540 has 12 divisors (see below), whose sum is σ = 552538476. Its totient is φ = 105245408.

The previous prime is 263113483. The next prime is 263113547. The reversal of 263113540 is 45311362.

It can be written as a sum of positive squares in 2 ways, for example, as 61246276 + 201867264 = 7826^2 + 14208^2 .

It is not an unprimeable number, because it can be changed into a prime (263113547) 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, 6577819 + ... + 6577858.

It is an arithmetic number, because the mean of its divisors is an integer number (46044873).

Almost surely, 2^263113540 is an apocalyptic number.

263113540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263113540 is an abundant number, since it is smaller than the sum of its proper divisors (289424936).

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

263113540 is a wasteful number, since it uses less digits than its factorization.

263113540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13155686 (or 13155684 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 263113540 is about 16220.7749506613. The cubic root of 263113540 is about 640.7880429429.

The spelling of 263113540 in words is "two hundred sixty-three million, one hundred thirteen thousand, five hundred forty".