263555243 has 8 divisors (see below), whose sum is σ = 301446912. Its totient is φ = 225723816.

The previous prime is 263555209. The next prime is 263555261. The reversal of 263555243 is 342555362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263555243 - 2²² = 259360939 is a prime.

It is a super-2 number, since 2×263555243² = 138922732225578098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263555263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5255 + ... + 23552.

It is an arithmetic number, because the mean of its divisors is an integer number (37680864).

Almost surely, 2^263555243 is an apocalyptic number.

263555243 is a deficient number, since it is larger than the sum of its proper divisors (37891669).

263555243 is a wasteful number, since it uses less digits than its factorization.

263555243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30121.

The product of its digits is 108000, while the sum is 35.

The square root of 263555243 is about 16234.3845895063. The cubic root of 263555243 is about 641.1464177149.

The spelling of 263555243 in words is "two hundred sixty-three million, five hundred fifty-five thousand, two hundred forty-three".