263621056 has 14 divisors (see below), whose sum is σ = 523123160. Its totient is φ = 131810496.

The previous prime is 263621053. The next prime is 263621069. The reversal of 263621056 is 650126362.

263621056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×263621056² = 138992122333110272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263621051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2059476 + ... + 2059603.

It is an arithmetic number, because the mean of its divisors is an integer number (37365940).

Almost surely, 2^263621056 is an apocalyptic number.

It is an amenable number.

263621056 is a deficient number, since it is larger than the sum of its proper divisors (259502104).

263621056 is an equidigital number, since it uses as much as digits as its factorization.

263621056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119091 (or 4119081 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 263621056 is about 16236.4114261742. The cubic root of 263621056 is about 641.1997806669.

The spelling of 263621056 in words is "two hundred sixty-three million, six hundred twenty-one thousand, fifty-six".