263521264 has 10 divisors (see below), whose sum is σ = 510572480. Its totient is φ = 131760624.

The previous prime is 263521249. The next prime is 263521283. The reversal of 263521264 is 462125362.

263521264 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8235024 + ... + 8235055.

It is an arithmetic number, because the mean of its divisors is an integer number (51057248).

Almost surely, 2^263521264 is an apocalyptic number.

It is an amenable number.

263521264 is a deficient number, since it is larger than the sum of its proper divisors (247051216).

263521264 is a wasteful number, since it uses less digits than its factorization.

263521264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16470087 (or 16470081 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 263521264 is about 16233.3380424360. The cubic root of 263521264 is about 641.1188631496.

The spelling of 263521264 in words is "two hundred sixty-three million, five hundred twenty-one thousand, two hundred sixty-four".