263145555 has 12 divisors (see below), whose sum is σ = 456119040. Its totient is φ = 140344272.

The previous prime is 263145551. The next prime is 263145559. The reversal of 263145555 is 555541362.

263145555 is a `hidden beast` number, since 2 + 63 + 1 + 45 + 555 = 666.

It is an interprime number because it is at equal distance from previous prime (263145551) and next prime (263145559).

It is not a de Polignac number, because 263145555 - 2² = 263145551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263145551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2923795 + ... + 2923884.

It is an arithmetic number, because the mean of its divisors is an integer number (38009920).

Almost surely, 2^263145555 is an apocalyptic number.

263145555 is a deficient number, since it is larger than the sum of its proper divisors (192973485).

263145555 is a wasteful number, since it uses less digits than its factorization.

263145555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847690 (or 5847687 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 263145555 is about 16221.7617723847. The cubic root of 263145555 is about 640.8140317197.

The spelling of 263145555 in words is "two hundred sixty-three million, one hundred forty-five thousand, five hundred fifty-five".