263899055 has 16 divisors (see below), whose sum is σ = 369307200. Its totient is φ = 180958176.

The previous prime is 263899049. The next prime is 263899061. The reversal of 263899055 is 550998362.

It is an interprime number because it is at equal distance from previous prime (263899049) and next prime (263899061).

It is not a de Polignac number, because 263899055 - 2⁶ = 263898991 is a prime.

It is a super-2 number, since 2×263899055² = 139285422459786050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75224 + ... + 78653.

It is an arithmetic number, because the mean of its divisors is an integer number (23081700).

Almost surely, 2^263899055 is an apocalyptic number.

263899055 is a deficient number, since it is larger than the sum of its proper divisors (105408145).

263899055 is an equidigital number, since it uses as much as digits as its factorization.

263899055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153903 (or 153889 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 263899055 is about 16244.9701446325. The cubic root of 263899055 is about 641.4250917997.

The spelling of 263899055 in words is "two hundred sixty-three million, eight hundred ninety-nine thousand, fifty-five".